: Often his wife's name appears as Wibke van
: Other sources name her Wibke Christians,
: daughter of Dr Hans Daniel Christians and
: Ursula Schmidt-Prange.
: Where does the van Gunsteren comes from ?
: Couldn't trace any previous marriage of
: Wibke to a Mr. van Gunsteren that would have
: lend her the surname.
: Wiki's entry mentiones both designations: