There have also been plenty of cases where Erhard was a short form of Eberhard. Examples of this are Eberhard of Friuli (c. 815-866) and Érard de La Marck (1472-1538). The latter's full name was Évrard and he is listed as both Erhard and Eberhard in German sources.- https://en.wikipedia.org/wiki/Eberhard_of_Friuli (in English)- https://de.wikipedia.org/wiki/Erhard_von_der_Mark (in German). [noted -ed]