22 Nov 1892 - Geburt of sein natural Vater Arend at Amsterdam, Amsterdam, Noord-Holland, Netherlands 

9 Jun 1902 - Geburt of seine natural Mutter Jeltje at Gorredijk, Opsterland, Friesland, Netherlands 

24 Apr 1923 - Eheschließung of eltern at Opsterland, Friesland, Netherlands 

Jun 1982 - Tod of sein natural Vater Arend at Sicilia, Italy 

Mrz 1987 - Tod of seine natural Mutter Jeltje at Haarlem, Haarlem, Noord-Holland, Netherlands