I think I've always gone with Ash (Red/Yellow) or Max (Silver), when I was younger.
More recently, I've been going with just Lyuri, Ryuri, Luuri, Ruuri, Ruuka, Luuka, Ryuuka, or White (in FR/LG).
One of them is named after a character in Riviera: The Promised Land. The others...I just felt like...