Biography
Jan Symonsz Heermans van Oegstgeest was born circa 1385 in den Haag, South Holland, Netherlands and died circa 1455 't Woudt, Midden-Delfland, South Holland, Netherlands of unspecified causes. He married Machteld Herman Dircksdr van den Hoorn (c1395-aft1465) .
Children
| Name | Birth | Death | Joined with |
| Margaretha Jans Sijmonsdr Heermans van Oegstgeest (c1425-1479) | |||
| Pieter Jansz van Oegstgeest (c1430-bef1505) | 1430 | 4 November 1505 | Katrijn Willemsdr (c1445-c1512) |
Footnotes (including sources)
| ‡ General |
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| ¶ Death |
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