| Male Willem Jonkheer van Loon |
| Birth | 18 Nov 1894 | London, GB |
| Death | 12 Dec 1961 | Amsterdam, Noord Holland, NLD |
| Burial | ||
| Marriage | 4 Apr 1936 | London, GB |
| Father | ||
| Mother | ||
| Female Amalia Tromp de Haas |
| Birth | 16 Apr 1902 | Bogor, IND |
| Death | 29 Nov 1962 | Amsterdam, Noord Holland, NLD |
| Burial | ||
| Other Spouse | Herman Philips Gelderman | F1831 | |
| Marriage | 26 Feb 1920 | |
| Father | Willem Rijk Tromp de Haas | F1640 Group Sheet | |
| Mother | Adelheid Staal | F1640 Group Sheet | |
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