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I had to check Bulbapedia, but there's an Ace Trainer Jake on route 221 (outside of Pal Park in Sinnoh), with a Staravia and Girafarig, both level 33 (it's slightly different in Platinum). I always imagined Jake to be a camper's name, to be honest.
My real name is Andrew. Since Generation II, I always share my name with a freakin' Fisherman. D: It's always the really annoying one with a load of Magikarp too. D:
Nathan was also a psychic in G/S/C. That's my real name, but I've only used it in-game twice. I usually use Nate, which was the name of a gentleman in Emerald, and a juggler in FR/LG. The gentleman was in Mossdeep gym and the juggler was in Fuschia gym.