Willem Davidzon was born 18 February 1752 in Venhuizen, North Holland, Netherlands to Dirk Davidzon (1716-1777) and Lijsbeth Meijer (c1721-1791) and died 27 January 1827 Venhuizen, North Holland, Netherlands of unspecified causes. He married Hiltje Valens (1753-1817) 29 June 1780 in Venhuizen, North Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Vrouwtje Davidzon (1783-1870) | |||
| Pietertje Davidzon (1786-1869) | 2 April 1786 Venhuizen, North Holland, Netherlands | 13 August 1869 Venhuizen, North Holland, Netherlands | Cornelis Groot (1786-1813) Bruin Zee (1791-1839) |
| Dirk Davidzon (1787-1858) | 9 December 1787 Venhuizen, North Holland, Netherlands | 2 December 1858 Venhuizen, North Holland, Netherlands | Grietje Timmerman (1792-1856) |
| Maartje Davidson (1789-1864) | |||
| Lijsbeth Davidson (1792-1866) | 30 September 1792 Venhuizen, North Holland, Netherlands | 30 January 1866 Zwaag, North Holland, Netherlands | Klaas Broertjes (1788-1863) |
| Aaltje Davidzon (1796-1873) | 26 February 1796 Venhuizen, North Holland, Netherlands | 6 April 1873 Venhuizen, North Holland, Netherlands | Klaas Hoek (1799-1878) |
Footnotes (including sources)
| ‡ General |