



| Birth | 17 Jun 1823 | Zichow, Uckermark, Germany |
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| Died | 12 Mar 1892 | Meichow, Uckermark, Germany |
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| Family | Michael Sy, b. 1819, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||
| Married | 1851 | Güstow, Brandenburg, Germany |
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| Birth | 15 Dec 1824 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family | Martin Eichmann, b. 1821, Gramzow, Uckermark, Brandenburg, Germany | |||||||
| Married | 1845 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Birth | 1821 | Gramzow, Uckermark, Brandenburg, Germany |
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| Family | Christine Sy, b. 15 Dec 1824, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||
| Married | 1845 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Birth | 14 Nov 1826 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family 2 | Michael Carl, b. 1823 | |||
| Married | 1846 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Birth | 1 Jun 1828 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family | Johanne Louise Priegnitz, b. 25 Mar 1834, Reckstatt | |||||||||
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| Birth | 25 Mar 1834 | Reckstatt |
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| Family | Isaac Wilhelm Sy, b. 1 Jun 1828, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||
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| Birth | 8 May 1830 | Fredersdorf, Uckermark, Brandenburg, Germany |
| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |

| Birth | 16 May 1833 | Fredersdorf, Uckermark, Brandenburg, Germany |
| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |

| Birth | 29 Nov 1836 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family | Henriette Wilhelmine Pitkowski, b. Abt 1836, Danzig | |||||||||||||||||
| Married | 21 Mar 1857 | Gramzow, Brandenburg, Germany |
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| Birth | Abt 1836 | Danzig |
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| Family | Abraham Sy, b. 29 Nov 1836, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||
| Married | 21 Mar 1857 | Gramzow, Brandenburg, Germany |
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| Birth | 7 Sep 1838 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family | Albertine Louise Wilhelmine Reinecke, b. 24 Jun 1844, Radekow, Brandenburg, Germany | |||||||||||||
| Married | 1866 | Berlin, Germany |
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| Birth | 24 Jun 1844 | Radekow, Brandenburg, Germany |
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| Family | Carl Sy, b. 7 Sep 1838, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||
| Married | 1866 | Berlin, Germany |
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| Birth | 1840 | Fredersdorf, Uckermark, Brandenburg, Germany |
| Died | 23 Jun 1844 | Fredersdorf, Uckermark, Brandenburg, Germany |
| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |

| Birth | 24 Oct 1844 | Fredersdorf, Uckermark, Brandenburg, Germany |
| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |

| Birth | 9 Feb 1748 | Gramzow, Uckermark, Brandenburg, Germany |
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| Died | 30 Dec 1809 | |||||||||||||||||||||||||||
| Family | Judith Berthe, b. 8 Sep 1760, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||||||||||||
| Married | 23 Oct 1778 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Birth | 1795 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||||||||||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Birth | 16 Aug 1795 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Died | 22 Jan 1865 | |||||||||||||||||||||||||
| Father | Abraham Sy, b. 9 Feb 1748, Gramzow, Uckermark, Brandenburg, Germany | |||||||||||||||||||||||||
| Mother | Judith Berthe, b. 8 Sep 1760, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||||||||||
| Married | 23 Oct 1778 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||||||||||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Birth | 1795 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Family | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |||||||||||||||||||||||||
| Married | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Name | Wilhelm August Sy | ||||||||||||||||||||||||
Relationship![]() | with Pierre Devantier | ||||||||||||||||||||||||
| Birth | 24 Oct 1844 | Fredersdorf, Uckermark, Brandenburg, Germany |
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| Gender | Male | ||||||||||||||||||||||||
Siblings |
6 brothers and 5 sisters | ||||||||||||||||||||||||
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| Oldest Known Ancestors | Paternal Line: Abraham Sy, b. 9 Feb 1748, Gramzow, Uckermark, Brandenburg, Germany d. 30 Dec 1809Maternal Line: Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany ![]() |
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| Person ID | I18689 | Devantier Tree | Decendant of Pierre Devantier (Born before 1600), German - Branch, Judith Devantier (1701-1748) Branch | |||||||||||||||||||||||
| Last Modified | 10 Jan 2026 | ||||||||||||||||||||||||
| Father | Isaac Sy, b. 16 Aug 1795, Fredersdorf, Uckermark, Brandenburg, Germany d. 22 Jan 1865 (Age 69 years) | |
| Mother | Lowise Rossow, b. 1795, Fredersdorf, Uckermark, Brandenburg, Germany | |
| Marriage | 14 Nov 1816 | Fredersdorf, Uckermark, Brandenburg, Germany |
| Age at Marriage | He : 21 years and 3 months - She : ~ 21 years and 11 months. | |
| Family ID | F6001 | Group Sheet | Family Chart |
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