For Koelen there are 13 on Yasni with different names.
Among the most common last names on Yasni Koelen is on position 4514.
In combination with "van" it is a well known surname dating from arround 1500 meaning "von Köln" At the later centuries the pastor did write the ö also as oe and then van Koelen appears
(Sent from: Hein van Koelen)
