| Johannes Cornelis Knuvers (1899 - 1966) |
|
| Petronella Agatha van Velzen (1899 - 1975) |
| Jacobus Cornelis Kramer | Maria Knuvers |
| *. 15 mei 1925 †. 20 dec 1989, Mijdrecht [ ]. ber. opl. gd. |
*. 13 sep 1925, Haarlemmeer †. [ ]. ber. opl. gd. |
| Hugo Johannes Kramer Petronella Francisca Maria Kramer Johannes Christianus Kramer |