For Zickuhr there are 21 on Yasni with different names.
Among the most common last names on Yasni Zickuhr is on position 4506.
I think he comes from the French "Segur" as far as I've been out of the internet gefunden.Die Segur in the 15 -16 century expelled from France and settled in Pomerania.
(Sent from: Zickuhr,Roland)