For Mrotzeck there are 3 on Yasni with different names.
Among the most common last names on Yasni Mrotzeck is on position 4524.
.... Appears to come from Russian, "Maros" means frost, since obviously Famileien from the East (binary Mrotzeck born - my grandparents lived near Gedansk) The inference seemed obvious that
(Sent from Yasni user)