For Kleff there are 31 on Yasni with different names.
Among the most common last names on Yasni Kleff is on position 4496.
The ancestors are probably Huguenot origin, who settled after the expulsion from southern France in the Calvinist (Protestant) countries, Switzerland, Baden-Württemberg and in the Netherlands today. The name may have been adapted from the French. French clef = key.
(Sent from: fitandeasy)