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Jan Sijwassinck was born 1680 in (Brinkheurne+ Winterswijk+ Gelderland+ Netherlands) to Hendrick Weekamp (1654-1710) and Fenneken Holthuis (1658-?) and died 22 April 1764 (Winterswijk+ Gelderland+ Netherlands) of unspecified causes. He married Trijnjen Rookes (1685-?) 15 May 1707 .
Children
Name | Birth | Death | Joined with |
Geertruijt Sijwassink (1723-?) | 1723 (Brinkheurne+ Winterswijk+ Gelderland+ Netherlands) | Jan Hendrik Rotmans (1719-1777) |