For M. Gehr there are 2 on Yasni with different names.
Among the most common last names on Yasni M. Gehr is on position 4525.
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The most likely origin of the surname Gehr is probably the derivation from the Germanic spear, "eng", her - at least for me, the time one of my teachers at the high school shall declare, when I - is a long long's her - goes to school.
(Sent from: Joseph Backhaus, geb. Gehr)