Bill
First name origin: English and German
First name meaning: from a Germanic personal name, either a short form of compound names such as Billard, or else a byname Bill(a), from Old English bil ‘sword’, ‘halberd’ (or a Continental cognate). (Bill as a short form of William was not used until the 17th century.)
Hader
Last name origin: German and Jewish (Ashkenazic)
Last name meaning: nickname for a quarrelsome person, from Middle High German hader ‘discord’, ‘argument’, ‘quarrel’, German Hader.