My guesses:
Iront > Irant (ire, irate, iron, rant, ant)
Maggyo > Frounder (frown, ground, thunder, flounder)
Victini > Victiriny (i dunno)
Gantoro > Crysaia (crystal, gaia)
Shanderaa > Shondemba (chandelier, condemn, ember)
Tsunbeaa > Iciliurs (icicle, jealous, ursa, sounds kinda greek)...