 1871 - 1937  (65 years)
 1871 - 1937  (65 years) 1945-1945
 1945-1945
| Willem de Heer | |
| B: | Feb 1945 | 
| D: | Feb 1945 | 
 1903-1988
 1903-1988
| Willem Johannes Cornelis de Heer | |
| B: | 1903 | 
| D: | 1988 | 
| Hetty Elizabeth van Kammen | |
| B: | 1914 | 
 1871-1937
 1871-1937
| Willem Johannes Cornelis de Heer | |
| B: | 31 Jul 1871 | 
| Rotterdam | |
| D: | 23 Mar 1937 | 
| Overschie | |
 1874-1959
 1874-1959
| Catharina Elisabeth PUNSELIE | |
| B: | 20 Jan 1874 | 
| Rotterdam | |
| M: | 15 Jun 1899 | 
| Rotterdam | |
| D: | 27 Jan 1959 | 
| Rotterdam | |