I actually like
Wyatt better than
Walter.
Walter seems very stiff.
Wyatt seems very cowboy, that's true. what is an SO? I actually don't like
Harold either. It makes me think of
Harold and the Purple Crayon or an old man being nagged by his wife. I suggest you just use the same initials W. H. and forget the actual names. Or if you want to honor him without using his names, ask him to be the godfather.