| Tree | | Genealogy of Isaac Keijzer |
| | Generation I |
| 1 | | Isaac Keijzer.
He married Clara Joseph.
| Children: | 1697: | Philip Isaac Keijzer [2.1] |
| | Meijer Isaac Keijzer [2.2] |
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| | Generation II |
| 2.1 | | Philip Isaac Keijzer; born 1697 at Amsterdam, died 1771 at Amsterdam.
He married 1723 at Amsterdam Marianne Jacob Levie, born 1696 at Amsterdam, died 1774 at Amsterdam.
| Children: | 1728: | Ester Philip Keijzer Wafelman [3.1] |
| 1729: | Vrouwtje Philip Keijzer [3.2] |
| 1732: | Isaac Philip Keijzer Wafelman [3.3] |
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| 2.2 | | Meijer Isaac Keijzer; died 1746 at Amsterdam.
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| | Generation III |
| 3.1 | | Ester Philip Keijzer Wafelman; born 1728 at Amsterdam, died 28 June 1801 at Amsterdam.
She married 1753 at Amsterdam Salomon Baruch, born 1729 at Zils, died 3 May 1787 at Amsterdam.
| Children: | 1758: | Sara Salomon [4.1] |
| 1761: | Isaac Salomon Wafelman [4.2] |
| | Hanna Salomom Wafelman [4.3] |
| 1766: | Barend Salomon [4.4] |
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| 3.2 | | Vrouwtje Philip Keijzer; born 1729 at Amsterdam.
She married 1754 at Amsterdam Michiel Simon,, born 1735 at Amsterdam.
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| 3.3 | | Isaac Philip Keijzer Wafelman; born 1732 at Amsterdam, died 8 March 1796 at Amsterdam.
He married 1755 at Amsterdam Ester Salomon Shachna, born 1730 at Amsterdam, died 25 Jan 1795 at Amsterdam, daughter of Salomon Shachna and Hendrikje Barend.
| Children: | 1762: | Salomon Isaac Keijzer Wafelman [4.5] |
| 1764: | Anna Isaac Keijzer Wafelman [4.6] |
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| | Generation IV |
| 4.1 | | Sara Salomon; born 1758 at Amsterdam, died 1 June 1843 at Amsterdam.
She married 1788 at Amsterdam Levie Joseph Cohen Kool, born 1754 at Amsterdam, died 27 Nov 1838 at Amsterdam.
| Children: | 1791: | Salomon Levie Cohen Kool [5.1] |
| 1797: | Joseph Levie Cohen [5.2] |
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| 4.2 | | Isaac Salomon Wafelman; born about 1761 at Amsterdam.
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| 4.3 | | Hanna Salomom Wafelman; died 18 March 1810 at Amsterdam.
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| 4.4 | | Barend Salomon; born Aug 1766 at Amsterdam.
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| 4.5 | | Salomon Isaac Keijzer Wafelman; born 1762 at Amsterdam, Diamond Polisher.
He married 1792 at Amsterdam Branca Mozes Bremer, born 1770 at Amsterdam, christened at Muiderberg Cemetery, died 10 May 1841 at Amsterdam, daughter of Mozes Levie Bremer and Diana Salomon.
| Children: | 1793: | Isaac Salomon Keijzer [5.3] |
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| 4.6 | | Anna Isaac Keijzer Wafelman; born 1764 at Amsterdam, died 1827 at Amsterdam.
She married 1792 at Amsterdam Leman Benjamin Winnik, born 1770 at Amsterdam, son of Benedictus Jacob Winnik and Isabel Hartog Hirsch.
| Children: | 1797: | Hester Leman Winnik [5.4] |
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| | Generation V |
| 5.1 | | Salomon Levie Cohen Kool; born April 1791 at Amsterdam.
He married Sep 1814 at Amsterdam Anna Jacob Bonnettemaker, born about 1790 at Amsterdam, died 9 July 1865 at Amsterdam, daughter of Jacob Mozes Bonnettemaker and Anna David Loots.
| Children: | 1816: | Sara Salomon Kool [6.1] |
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| 5.2 | | Joseph Levie Cohen; born about 1797 at Amsterdam, died 15 Aug 1842 at Amsterdam.
He married 21 Dec 1821 at Amsterdam Matje David Blok, born 14 Feb 1801 at Amsterdam, died 13 Jan 1858 at Amsterdam, daughter of David Aron Blok Schieler and Vrouwtje Salomon Blits Schreiber.
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| 5.3 | | Isaac Salomon Keijzer; born about 1793 at Amsterdam, Diamond Polisher.
He married 20 March 1815 at Amsterdam Vrouwtje Abraham Keesing, born 1794 at Amsterdam, daughter of Abraham Tobias Keesing and Marianne Samuels.
| Children: | 1822: | Marianne Keijzer [6.2] |
| 1832: | Ester Keijzer [6.3] |
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| 5.4 | | Hester Leman Winnik; born 1797 at Amsterdam.
She married 15 Dec 1819 at Amsterdam Abraham Ezechiel Jacobson, born 1796 at Amsterdam, son of Ezechiel Jacob Jacobson Maarsenman and Anna Mozes.
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| | Generation VI |
| 6.1 | | Sara Salomon Kool; born about 1816 at Amsterdam.
She married 17 May 1843 at Amsterdam Salomon Sander Grewel, born about 1811 at Amsterdam, son of Sander Salomon Grewel Cohen and Sara Aron van de Tong Kruyer.
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| 6.2 | | Marianne Keijzer; born 1822 at Amsterdam, Seamstress.
She married 1 June 1855 at Amsterdam Samson Gokkes, born 30 April 1830 at Blokzijl, Salesman, died Feb 1900 at Amsterdam, son of Jacob Davids Gokkes and Judith Samson van Diepenheim.
| Children: | 1856: | Judith Gokkes [7.1] |
| 1857: | Flora Gokkes [7.2] |
| 1859: | Jacob Gokkes [7.3] |
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| 6.3 | | Ester Keijzer; born about 1832 at Amsterdam.
She married 15 June 1864 at Blokzijl Hartog Philips Noordwal, born 21 Dec 1824 at Opsterland, Merchant, son of Philip Abrahams Noordwal and Engelina Abrahams Hes.
| Children: | 1873: | Izaak Noordwal [7.4] |
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| | Generation VII |
| 7.1 | | Judith Gokkes; born 13 April 1856 at Blokzijl, died 1942 at Laren.
She married 9 July 1891 at Amsterdam (civil marriage) Abraham Stibbe, born 9 July 1849 at Wieringen, christened at Diemen A-84-29, Army Officer, Police Station Janitor, died 31 Jan 1927 at Amsterdam, son of Meijer Stibbe and Leentje Stofkoper.
| Children: | 1893: | Helena Marianna Stibbe [8.1] |
| 1895: | Samson Maurits Stibbe [8.2] |
| 1897: | Flora Stibbe [8.3] |
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| 7.2 | | Flora Gokkes; born 8 Dec 1857 at Blokzijl, Seamstress, died 29 Oct 1901 at Amsterdam.
She married 17 Jan 1895 at Amsterdam Marcus van Gelder, born 24 Jan 1857 at Harlingen, Butcher, Merchant, died July 1934 at Amsterdam, son of Mozes van Gelder and Rachel Trompetter.
| Children: | 1896: | Maurits van Gelder [8.4] |
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| 7.3 | | Jacob Gokkes; born 23 March 1859 at Blokzijl, Diamond Cutter, died 21 May 1937 at Amsterdam.
He married (1) 12 Dec 1894 at Amsterdam Sara Keijzer, born 1858 at Blokzijl, Diamond Cutter, died before 1929, daughter of Emanuel Meyer Keijzer and Beth Gokkes.
| Children: | 1895: | Marianne Gokkes [8.5] |
| 1901: | Bertha Flora Gokkes [8.6] |
He married (2) 26 Oct 1911 at Amsterdam Esther Klok, born 1866 at Amsterdam, died 13 Jan 1939 at Amsterdam, daughter of Joseph Hartog Klok and Rebecca Groen.
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| 7.4 | | Izaak Noordwal; born 12 March 1873 at Gaasterland, Tailor, died 15 Oct 1942 at Auschwitz.
He married 21 Dec 1904 at Arnhem Heintje Nenk, born about 1872 at Arnhem, died 15 Oct 1942 at Auschwitz, daughter of Jacob Nenk and Betje Vredenburg.
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| | Generation VIII |
| 8.1 | | Helena Marianna Stibbe; born 5 Aug 1893 at Amsterdam, died 20 Jan 1990 at Amsterdam.
She married 6 Aug 1919 at Amsterdam Siegfried Leo Louis Beem, born 12 April 1892 at Zevenbergen, Elementary School Teacher, Teacher of German and Mathematics, died 21 Feb 1997 at Amsterdam, son of Benjamin Beem and Hesther van der Giessen.
| Children: | 1920: | Paula Sabil Henriette Ibène Beem [9.1] |
| 1924: | Eleonore Louise Beem [9.2] |
| 1926: | Agnes Irene Beem [9.3] |
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| 8.2 | | Samson Maurits Stibbe; born 1 Aug 1895 at Amsterdam, Teacher of German, died 28 Feb 1965 at Amsterdam.
He married April 1920 at Amsterdam Lea de Jong, born 24 Sep 1896 at Amsterdam, died 25 Dec 1984 at Utrecht, daughter of Eliazar Levi de Jong and Rebecca Jolis.
| Children: | 1922: | Hugo Stibbe [9.4] |
| 1923: | Else Judith Stibbe [9.5] |
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| 8.3 | | Flora Stibbe; born 11 Dec 1897 at Amsterdam, Journalist, died 23 May 1995 at Amsterdam.
She married Arthur Kaiser, born 7 May 1892 at Weesperkarspel, Travelling Salesman, died 1956 at Amsterdam, son of Philippe Antoine Kaiser and Adriana Hendrika van Lachterop.
| Children: | 1931: | Erik Stibbe [9.6] |
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| 8.4 | | Maurits van Gelder; born 4 April 1896 at Amsterdam, died 11 Feb 1942 at Mauthausen.
He married 6 April 1921 at Amsterdam Jeannette Presburg, born 20 June 1897 at Amsterdam, daughter of Hartog Presburg and Duifje Peper.
| Children: | 1922: | Marcus van Gelder [9.7] |
| 1928: | Helena van Gelder [9.8] |
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| 8.5 | | Marianne Gokkes; born 2 Nov 1895 at Amsterdam.
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| 8.6 | | Bertha Flora Gokkes; born 28 Nov 1901 at Amsterdam, died 28 May 1943 at Sobibor.
She married 28 Aug 1929 at Amsterdam Gerrit Koster, born 20 Dec 1901 at Amsterdam, Office Worker, died 28 May 1943 at Sobibor, son of Isaac Koster and Rachel Polak.
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| | Generation IX |
| 9.1 | | Paula Sabil Henriette Ibène Beem; born 27 May 1920 at Amsterdam, Secretary, died 1 Aug 1991 at Amsterdam.
She married about 1949 at Stockholm Holger Lagerlöf, born at Sweden.
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| 9.2 | | Eleonore Louise Beem; born 25 June 1924 at Amsterdam, Elementary School Teacher, died 24 March 1971 at The Hague.
She married 1 Nov 1952 at Amsterdam Albert Hovenkamp, born 25 June 1924 at Doorn, Chemist, son of Albert Hovenkamp and Jansje Roline Smits.
| Children: | 1953: | Peter Hans Hovenkamp [10.1] |
| 1955: | Frans Hovenkamp [10.2] |
| 1955: | Wouter Hovenkamp [10.3] |
| 1959: | Margot Hovenkamp [10.4] |
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| 9.3 | | Agnes Irene Beem; born 25 Sep 1926 at Amsterdam, Journalist, died 14 Sep 1993 at Capelle aan den IJssel.
She married 17 Aug 1957 at Rotterdam Hans Sittig, born 23 Oct 1912 at Berlin, Statistical Consultant, Erasmus University Professor, died 9 June 2008 at Voorschoten, son of Ernst Sittig and Irma Reiniger.
| Children: | 1961: | Sander Paul Sittig [10.5] |
| 1963: | Heleen Martine Sittig [10.6] |
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| 9.4 | | Hugo Stibbe; born 2 March 1922 at Surabaya, Agrarian Engineer, Soil Phycisist, died 17 July 2007 at Israel.
He married 17 March 1953 at Amsterdam Elma Sara van Adelsberg, born 26 Nov 1925 at Amsterdam, daughter of Salomon van Adelsberg and Gertrud Betty Cohn.
| Children: | 1956: | Naomi Stibbe [10.7] |
| 1958: | Eytan Meir Stibbe [10.8] |
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| 9.5 | | Else Judith Stibbe; born 14 Dec 1923 at Surabaya, Dentist, Psychologist.
She married 23 May 1951 at Utrecht Hendrikus Adrianus Sillevis, born 17 Nov 1920 at Utrecht, died 25 March 2004 at Loenen aan de Vecht.
| Children: | 1953: | Geert Jan Sillevis [10.9] |
| 1955: | Martine Judith Sillevis [10.10] |
| 1957: | Cecile Sillevis [10.11] |
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| 9.6 | | Erik Stibbe; born 30 Dec 1931 at Amsterdam, Journalist.
He married 18 Sep 1961 at Haarlem Pieternella van der Spek, born 1 Oct 1934 at Amsterdam, daughter of Leendert van der Spek and Tanneke de Rover.
| Children: | 1962: | Sicco Marcel Stibbe [10.12] |
| 1963: | Onno Alexis Stibbe [10.13] |
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| 9.7 | | Marcus van Gelder; born 28 Jan 1922 at Amsterdam.
He married Kitty Mertz.
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| 9.8 | | Helena van Gelder; born 26 Aug 1928 at Amsterdam.
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| | Generation X |
| 10.1 | | Peter Hans Hovenkamp; born 9 Oct 1953 at Utrecht, Biologist.
He married 20 Dec 1979 at Leiden Gerda Alida van Uffelen, born 9 Aug 1953 at Rotterdam, Biologist.
| Children: | | Jan Hovenkamp [11.1] |
| 1992: | Pieter Daniël Louis Hovenkamp [11.2] |
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| 10.2 | | Frans Hovenkamp; born 4 Feb 1955 at Utrecht, Biologist.
He married 8 April 1994 at Schiermonnikoog Nanneke Benninga, born 17 Oct 1954 at Loppersum, Physiotherapy Teacher.
| Children: | 1993: | Anne Floor Louise Hovenkamp [11.3] |
| 1995: | Gijs Thomas Hovenkamp [11.4] |
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| 10.3 | | Wouter Hovenkamp; born 4 Feb 1955 at Utrecht, Biologist, died 11 March 2008 at Leiden.
He married 6 May 2003 at Schiermonnikoog Hiltje Anna Huizenga, born 4 June 1966 at Finkum, Architect.
| Children: | 2004: | Anna Eleonore Hovenkamp [11.5] |
| 2006: | Aafke Tine Hovenkamp [11.6] |
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| 10.4 | | Margot Hovenkamp; born 13 April 1959 at Utrecht, Journalist, Pedagogue.
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| 10.5 | | Sander Paul Sittig; born 18 Jan 1961 at Rotterdam, Pianist.
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| 10.6 | | Heleen Martine Sittig; born 3 Aug 1963 at Leiden, Journalist, Translator, Interpreter.
She married Jorge Antonio Carlos Gustavo Heredia Ugarte, born Aug 1958 at Lima, Visual Artist, son of Manuel Ernesto Heredia Calderón and Norma Inés Carmen Benigna Ugarte García.
| Children: | 1994: | Rafael Ernesto Emmanuel Heteróclito Heredia Sittig [11.7] |
| 2001: | Paz Agnès Nadia María Heredia Sittig [11.8] |
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| 10.7 | | Naomi Stibbe; born 12 March 1956 at Haifa.
She married Ornan Rotem.
| Children: | 1986: | Lian Rotem [11.9] |
| 1988: | Lialin Rotem [11.10] |
| 1990: | Nadine Rotem [11.11] |
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| 10.8 | | Eytan Meir Stibbe; born 12 Jan 1958 at Haifa, Butcher.
He married 8 Jan 1985 at Ramat Hasharon Ora Ertog, born 10 Dec 1960 at Bror Hail.
| Children: | 1985: | Amit Stibbe [11.12] |
| 1987: | Shir Stibbe [11.13] |
| 1993: | Yoav Stibbe [11.14] |
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| 10.9 | | Geert Jan Sillevis; born 2 Oct 1953 at Utrecht.
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| 10.10 | | Martine Judith Sillevis; born 7 Feb 1955 at Utrecht.
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| 10.11 | | Cecile Sillevis; born 18 July 1957 at Utrecht.
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| 10.12 | | Sicco Marcel Stibbe; born 7 April 1962 at Monnickendam, Cleaning Machine Specialist.
He married 22 July 1993 Annet Bosgra, born about 1964.
| Children: | 1995: | Jeroen Stibbe [11.15] |
| 1997: | Mirjana Stibbe [11.16] |
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| 10.13 | | Onno Alexis Stibbe; born 25 Dec 1963 at Monnickendam, Bookkeeping Office Manager.
He married 12 April 1995 Irma Narold, born 5 Sep 1965, Notary's Clerk.
| Children: | 1995: | Zjoske Michelle Stibbe [11.17] |
| 1998: | Jeffrey Romeo Stibbe [11.18] |
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| | Generation XI |
| 11.1 | | Jan Hovenkamp.
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| 11.2 | | Pieter Daniël Louis Hovenkamp; born 10 March 1992 at Leiden.
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| 11.3 | | Anne Floor Louise Hovenkamp; born 19 July 1993 at Enschede.
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| 11.4 | | Gijs Thomas Hovenkamp; born 13 April 1995 at Enschede.
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| 11.5 | | Anna Eleonore Hovenkamp; born 18 June 2004 at Delft.
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| 11.6 | | Aafke Tine Hovenkamp; born 2006.
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| 11.7 | | Rafael Ernesto Emmanuel Heteróclito Heredia Sittig; born 25 Sep 1994 at Amsterdam.
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| 11.8 | | Paz Agnès Nadia María Heredia Sittig; born 31 Dec 2001 at Amsterdam.
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| 11.9 | | Lian Rotem; born 16 April 1986 at Jerusalem.
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| 11.10 | | Lialin Rotem; born 22 June 1988 at Tel Aviv.
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| 11.11 | | Nadine Rotem; born 18 Dec 1990 at Tel Aviv.
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| 11.12 | | Amit Stibbe; born 27 Oct 1985 at Tel Aviv.
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| 11.13 | | Shir Stibbe; born 15 Oct 1987 at Maccabim, Israel.
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| 11.14 | | Yoav Stibbe; born 19 Nov 1993 at Maccabim, Israel.
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| 11.15 | | Jeroen Stibbe; born 2 Nov 1995 at Hoorn.
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| 11.16 | | Mirjana Stibbe; born 15 April 1997 at Hoorn.
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| 11.17 | | Zjoske Michelle Stibbe; born 7 Dec 1995 at Haarlem.
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| 11.18 | | Jeffrey Romeo Stibbe; born 11 Nov 1998 at Haarlem.
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