I actually know a (black) kid named Nixon. Unsurprisingly, he has very right-wing views. I’m just surprised any self-respecting black person would actually want to name their child after Richard Nixon. Yikes. Objectively without that association and just the meaning itself Nixon is a fine name. I like Nix.
Since my husband's name is Nicolas, I thought the meaning of this name being son of Nicholas was really neat. Definitely a middle name contender, I do think as a name in general most people do think of the President with this name.