Gary, but without the r. lol (That's what I did a long time ago in my old game.)
B/c someone at the Lake of Rage says: "Some "..." guy made fun of my Pokemon." LOL
Now, my rival's name in Silver is Alex. (It's the male version of my cousin's name.)
(I really want to think of a good name for him in HG/SS to fit his new look.)
Usually, I gave him insulting names for laughs. (I named Gold after guys I liked a few times: Tyler, Steven, John.) Now, he's named Ash. (Male version of my name, Ashley.)