Yvonne de Beaufort

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- 1 Yvonne de Beaufort [1] b. 27 Feb 1946
Antonie Jacob René de Monchy b. 25 Jun 1937
- 2 Salomon Jean René de Monchy [1.1]
b. 31 May 1970
- 2 Jan Maarten de Monchy [1.2]
b. 5 Nov 1970
- 2 Elisabeth Marguérite de Monchy [1.3]
b. 22 Jun 1975
- 2 Salomon Jean René de Monchy [1.1]
Severin Michiel de Lange b. 7 Nov 1944
- 2 Philippine Severine de Lange [1.4]
b. 11 Jan 1986
- 2 Okke Willem Pieter de Lange [1.5]
b. 10 Jul 1988
- 2 Philippine Severine de Lange [1.4]