Four or more generations of descendants of Bertha de Zwart (1912-) if they are properly linked:
1. Bertha de Zwart (1912-)
- 2. Pieter A.M. Tol (1938-1940)
Four or more generations of descendants of Bertha de Zwart (1912-) if they are properly linked:
1. Bertha de Zwart (1912-)