For Drüner there are 4 on Yasni with different names.
Among the most common last names on Yasni Drüner is on position 4523.
Over twenty years ago I have in the Hesse state library (and / or Murhard library) in Kassel researched in old volumes that the name is probably or possibly be attributed to the Druids. "Druidener" or something like that was in the course of generations "Drüner" , Who wants to know more, should go and read again.
