Hermanus Onneweer was born 27 April 1804 in Hoogkarspel, North Holland, Netherlands to Barend Onneweer (1760-1846) and Hendrina Scheerders (1767-1836) and died 23 October 1883 Hoogkarspel, North Holland, Netherlands of unspecified causes. He married Trijntje Molenaar (1802-1869) 20 July 1823 in Venhuizen, North Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Jacob Onneweer (1824-1824) | |||
| Ariaantje Onneweer (1825-1827) | |||
| Ariaantje Onneweer (1828-1851) | |||
| Jacob Onneweer (1830-1899) | |||
| Theodora Onneweer (1833-1902) | |||
| Bernardus Onneweer (1836-1900) | |||
| Dieuwertje Onneweer (1838-1859) | |||
| Simon Onneweer (1841-1927) | |||
| Johanna Onneweer (1844-1906) | |||
Siblings
| Name | Birth | Death | Joined with |
| Marijtje Onneweer (1793-1842) | |||
| Joanna Onneweer (1794-1843) | 21 July 1794 Hoogkarspel, North Holland, Netherlands | 3 May 1843 Hem, North Holland, Netherlands | Gerrit Spil (1796-1849) |
| Antje Onneweer (1797-1867) | |||
| Aaltje Onneweer (1801-1867) | 19 July 1801 Hoogkarspel, North Holland, Netherlands | 4 October 1867 Grootebroek, North Holland, Netherlands | Pieter Groot (1804-1846) |
| Hermanus Onneweer (1804-1883) | 27 April 1804 Hoogkarspel, North Holland, Netherlands | 23 October 1883 Hoogkarspel, North Holland, Netherlands | Trijntje Molenaar (1802-1869) |
| Aafje Onneweer (1808-1881) | |||
Residences
Footnotes (including sources)
| ‡ General |