| Family Tree Collection | Main index A-Z | Total index | Names | Index places | Hertz, Nijmegen |
| Family page |
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Isaac David Blok, birth 9 Jan 1819 Nijmegen, died 25 Dec 1888 Nijmegen, son of David Salomon (Gerrard) Blok and Hester Isaac Hertz
to: Rosa de Wijze |
| Family page |
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Isaac David Blok
to: Johanna van Os |