Jan Jansz Zwemmer was born 24 August 1765 in Zwaag, North Holland, Netherlands to Jan Zwemmer (c1730-bef1824) and Hansje Moerbeek (c1735-bef1824) and died 31 March 1841 Wognum, North Holland, Netherlands of unspecified causes. He married Maartje Bakker (-bef1809) . He married Jannetje Brink 1 July 1824 in Wognum. He married Maartje Groteboer .
Children
| Name | Birth | Death | Joined with |
| Jan Zwemmer (1785-1842) | |||
| Trijntje Zwemmer (1787-1842) | 17 August 1787 Wadway, North Holland, Netherlands | 9 September 1842 Wognum, North Holland, Netherlands | Jacob Commandeur (c1782-c1852) |
Footnotes (including sources)
| ‡ General |
| ₪2 Wedding 2 |
| ¶ Death |