For Der there are 844 on Yasni with different names.
Among the most common last names on Yasni Der is on position 3725.
"der" is the German masculine article, however, the original name is probably Dutch, combined with the Dutch "van"(of) van der means "of the". Heusen is the German writing for Dutch "Huyzen" or "Huizen", which means houses , so the name should not be analyzed piece meal, but let it stand in its entirety for "of the houses"
(Sent from: Ursula van der Heusen)