| Male Jacob Sickenga |
| Birth | 6 Sep 1845 | Wolvega |
| Death | 2 Jul 1911 | Leeuwarden |
| Burial | ||
| Marriage | 22 Jul 1870 | Den Haag |
| Father | ||
| Mother | ||
| Female Barones Wilhelmina Frederica Casimira Charlotte Juliana van Heemstra |
| Birth | 2 Apr 1848 | Deinum |
| Death | 2 Feb 1922 | Hilversum |
| Burial | ||
| Father | Balthazar Theodorus Willems van Heemstra | F3716 Group Sheet | |
| Mother | Anna Catharina Louisa Hillegonda van Cammingha | F3716 Group Sheet | |