Jacob Jansen (1824- ) 
|
Jacob Theodorus Jansen (1853- )  |
| Wilhelmus Theodorus Jansen (1869- ) |
| Gerardus Jacobus Jansen (1856- )
|
| Gijsbert Karel Jansen (1881-1965) |
| Johan Bertram Eugène Jansen (1885-1965) |
Willemijntje Theodora Jansen (1888- ) |
| Bertha Eugénie Jansen (1894-1961) |
