Why was his name being claimed as offensive?

No's Posts on the community forum are spot on.

Agreed.

Say I made a tauren and named him Sittingbull on RP server. Now, for me, that's actually the name of a very important figure in my ethnic ancestry - the chief who fought General Custer, and whose later death triggered Wounded Knee.

That might be bannable for using the name of a real life person from history - although the name shows up all over the records on warcraftrealms. But as far as being a RP violation - that would be absurd, given that it is in fact the kind of name that comes straight out of the people the Tauren culture is stereotyped off of...

So its not just nicknames that would come up with 'Steak' - its entirely fitting sometimes as the actual name. Especially when the original language is translated over. Sitting Bull was after all, just the English translation of his Lakota name - but it is the name that is recorded for him in most reports of his life.

Go look up the meanings of your own names, when actually translated into modern english, and consider if you were to use that meaning as your toon's name...