Brothers?

So there have been a few politicians in America that first gained fame as movie/TV personalities before winning elections. There’s Trump, Reagan, and Schwarzenegger, right? I was just thinking about these guys, and noticed one more very weird similarity, tell me if you find this as freaky as I did. Their first names: doNALD, roNALD, and arNOLD. Why are they all so similar like that? Weird, right?