Most I can think of are already suggested.
Milo has been mentioned a lot but I kind of like
Orson Milo. There's a nice auditory "ride" from the low "o" up to the long "i" then back down to the "o". Someone suggest
Orson Lionel...similar thing there. Maybe...
Orson TimothyOrson Romeo (there's the "ride" again)
Orson ClarkOrson Pierce