Alida Petronella Maria Keizer was born 19 February 1905 in Hoorn, North Holland, Netherlands to Jacob Keizer (1879-1954) and Eva Bos (1879-) and died 9 December 1953 Hoorn, North Holland, Netherlands of unspecified causes. She married Jan Tol (1904-1992) .
Alida and Jan were 7th cousins once removed; both descend from Pieter Laan (c1620-bef1686).
Jan Tol and Alida Keizer
Children
| Name | Birth | Death | Joined with |
| Rie Tol (1935-1995) | |||
| Jaap Tol (1937-) | 1937 Hoorn, North Holland, Netherlands | Riek Faas (1931-) | |
| Jan Tol (1938-) | |||
| Nicolaas H. Tol (1939-) | 5 December 1939 Hoorn, North Holland, Netherlands | 16 June 2021 Hoogkarspel | Martha C.M. Korver (1941-) |
| Aad Tol (1941-) | |||
| Kees Tol (1943-) | |||
| Lien Tol (1945-) | |||
| Alie Tol (1946-) | |||
Footnotes (including sources)
| ‡ General |
| ¶ Death |