Ernest Augustus was the brother of William IV.
The form William is identified as typical of the Old Norman form Williame, Willame, because first, the English language should have retained (h)elm (see common words helm, helmet, in French heaume), second, -iaume [iam] (typical of Popular French, see Guillaume) turned to -iame [iam] (typical of some Norman and Picard dialects) > English -iam
== Overview ==The term brother comes from the Proto-Indo-European *brhtr, which becomes Latin frater, of the same meaning

