Johanna Blok was born 1860 in Amsterdam, North Holland, Netherlands to Elias Blok (1835-1876) and Johanna Francisca van Tinteren (1838-1926) . She married Johannes Valkenaars (c1856-) 26 October 1882 in Amsterdam, North Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Elisabeth Valkenaars (c1884-) | |||
| Anna Johanna Valkenaars (c1885-) | |||
| Johannes Franciscus Valkenaars (c1886-) | |||
| Frans Valkenaars (c1890-) | |||
| Hendricus Valkenaars (c1893-) | |||
| Catharina Maria Johanna Valkenaars (c1895-) | |||
| Anna Maria Catharina Valkenaars (c1898-) | |||
| Marianne Valkenaars (c1901-) | |||
Residences