Meindert Claasz Keizer was born June 1714 in Broekoord, Andijk, North Holland, Netherlands to Claas Keijser (1679-) and Immetje Casenbroot (1686-) and died 19 May 1797 Wervershoof, North Holland, Netherlands of unspecified causes. He married Trijn Jans (-) 28 January 1737 in Wervershoof, North Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Immetje Keizer (1740-1820) | |||
| Gerrit Keizer (1742-aft1822) | 9 January 1742 Wervershoof, North Holland, Netherlands | 21 June 1816 Wervershoof, North Holland, Netherlands | Gerritje Cornelisse Spek (c1750-aft1782) |
| Debora Keizer (1743-1743) | |||
| Cornelis Keizer (1745-1835) | 14 July 1745 Wervershoof, North Holland, Netherlands | 21 January 1835 Wervershoof, North Holland, Netherlands | Marijtje Schuit (1743-1783) Aafje Jacobs (-) Aafje Tiet (1775-1851) |
| Claas Keizer (1748-1781) | |||
| Johannes Keizer (1751-) | |||
Other speculation
Claes Derricksz had a son Meindert in 1714 and Claes Gerardsz had a son Meindert in 1716.
| Derrick (c1609) | |||||||||||||||||||||||||||||||||||||
| Cornelis (c1639-) | |||||||||||||||||||||||||||||||||||||
| Claas (c1657) | Gerard | Derrick | Catharina (1669-) | ||||||||||||||||||||||||||||||||||
| Derrick (c1687-) | Claas | Claas | |||||||||||||||||||||||||||||||||||
| Petrus (1726-) | Meindert (1714-) | Catharina (1716-) | Meindert (1716-) | Crelis | |||||||||||||||||||||||||||||||||
Footnotes (including sources)
| ‡ General |