Jan Neefjes was born 2 January 1831 in Zwaagdijk, North Holland, Netherlands to Petrus Neefjes (1799-1865) and Elisabeth Laan (1802-1889) and died 12 January 1915 Wervershoof, North Holland, Netherlands of unspecified causes. He married Geertje Commandeur (1829-1866) 2 May 1850 in Wervershoof, North Holland, Netherlands. He married Grietje Elders (1840-1912) 15 April 1875 in Wervershoof, North Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Pieter Neefjes (c1853-1858) | |||
| Trijntje Neefjes (1855-1943) | 16 June 1855 Wervershoof, North Holland, Netherlands | 20 March 1943 Wervershoof, North Holland, Netherlands | Pieter Koopman (1855-1945) |
| Elisabeth Neefjes (1857-1857) | |||
| Elisabeth Neefjes (1858-1936) | |||
| Pieter Neefjes (1859-1859) | |||
| Pieter Neefjes (1860-1934) | |||
| Jansje Neefjes (1861-1861) | |||
| Cornelis Neefjes (1863-1863) | |||
| Jansje Neefjes (1864-1912) | |||
| Maartje Neefjes (1865-1865) | |||
| nn Neefjes (1866-1866) | |||
| Name | Birth | Death | Joined with |
| Johannes Neefjes (1880-) | |||
| Petrus Neefjes (1882-1957) | |||
Siblings
| Name | Birth | Death | Joined with |
| Cornelis Neefjes (1817-1889) | 13 March 1817 Nibbixwoud, North Holland, Netherlands | 7 December 1889 Wervershoof, North Holland, The Netherlands | Trijntje Schoenmaker (1817-1858) Elisabeth Steltenpool (1819-1864) Teunisje Vriend (1833-1905) |
| Marijtje Neefjes (1818-1893) | |||
| Pieter Neefjes (1821-1870) | |||
| Aaltje Neefjes (1823-1866) | 22 July 1823 Hoogkarspel, North Holland, Netherlands | 20 November 1866 Hoogkarspel, North Holland, Netherlands | Gerrit Vlaar (1821-1873) |
| Catharina Neefjes (1824-1910) | |||
| Klaas Neefjes (1825-1896) | 10 December 1825 Hoogkarspel, North Holland, Netherlands | 8 May 1896 Wervershoof, North Holland, Netherlands | Trijntje Bakker (1824-1853) Jantje Bakker (1827-1908) |
| Maartje Neefjes (1827-1869) | 11 December 1827 Zwaagdijk, Hauwert, North Holland, Netherlands | 30 October 1869 Oosteinde, Zwaag, North Holland, Netherlands | Frans Veul (1824-1864) Gerrit Oostermeijer (1836-1877) |
| Name | Birth | Death | Joined with |
| Jan Neefjes (1831-1915) | 2 January 1831 Zwaagdijk, North Holland, Netherlands | 12 January 1915 Wervershoof, North Holland, Netherlands | Geertje Commandeur (1829-1866) Grietje Elders (1840-1912) |
| Jantje Neefjes (1832-1893) | |||
| Jacobus Neefjes (1833-1866) | 12 March 1833 Zwaagdijk, North Holland, Netherlands | 15 August 1866 Wervershoof, North Holland, Netherlands | Trijntje Kooter (1835-1905) |
| Antje Neefjes (1834-1913) | 13 February 1834 Zwaagdijk, North Holland, Netherlands | 13 January 1913 Wervershoof, North Holland, Netherlands | Arien Laan (1833-1913) |
| Klaas Neefjes (1835-1917) | |||
| Catharina Neefjes (1836-1911) | |||
| Gerrit Neefjes (1837-1895) | |||
| Arien Neefjes (1839-1924) | |||
| Tecla Neefjes (1841-1902) | |||
| Simon Neefjes (1844-1925) | 7 March 1844 Zwaagdijk, North Holland, Netherlands | 27 December 1925 Zwaagdijk, North Holland, Netherlands | Meinemptje Deken (1845-1870) Trijntje Ruiter (1852-1894) |
Residences
Footnotes (including sources)
| ₪ Wedding |
| ¶ Death |