In my (yet unwritten) fantasy novel, the three male leads are Artemi, Marcaes, and Lantus. Artemi is my primary nick, and it does get used in RL, but the other two get brought out from time to time as the situation dictates. Marcaes is my Shoddy name as Marcaes is the closest one to a pokemon trainer of the three.
Artemi is originally from a Sailor Moon pen and paper game I played, I believe. It is, of course, based off the name Artemis, but that was too feminine, and also already taken in Sailor Moon, so I dropped the "S" to make it sound a bit more manly. As it's a somewhat common name, the number "71415" can be added, as necessary to make it fit. Normally, Artemi7 or Artemi71 works. Of note, the shortened form of Artemi is "Tem", not "Art". This came from an old Chrono Trigger fiction site, where there was already a member named "Art", so... they came up with "Tem". I rather like it, so, there it is.
Marcaes is a sorcerer of sorts who I believe I made for a D&D game. He has a black fox named Impulse, which ended up rather well timed when Umbreon came out and I found I really liked. Thus, my standard trainer name is Marcaes.