English= Grimsley (duh, i prefer for u to call me that) From the word "grim," "grimace," or possibly even "grime." The "sley" in his name may likely represent the word "sly."
Japanese= Gimma (second most called name) From ギーマ (gīma), Vaccinium wrightii. Also from 魔 (ma), "devil" or "evil influence" and/or ブギーマン (bugīman), "boogeyman" (NO WAYZ!! D:).
French= Pieris From Pieris (A plant genus)
German= Astor Possibly from the genus Aster or the family Asteraceae. (Beats me, I'll have to ask a scientist :P)
Italian= Mirton (EW!)Possibly from the genus Myrtus, as Mirto is made from myrtle. (I might need to ask Luigi about that one...)
Spanish= Aza (Third most called name) From Azalea. May also be derived from azar, chance. (Hense my gambling habit~ :3)
Korean= Blarry (SERIOUSLY?!) From blackberry. (OMFG THIS IS HUMILITATION!!!!)