Preposterous. By simple, logical deduction and using the entire name, we get the message:
Root Man Image VII
'Root man' clearly refers to Velun, God of Nature and Beasts.
'Image' refers to this being an illusion, or otherwise a clone or seeming, hinting that there's more to this NPC than meets the eye.
'VII' is, naturally, the Roman numeral for seven. Velun is, of course, one The Seven. This is to further intimate it's referring to one of the gods, so you were close.
Pretty sure that's unassailable and indisputable logic. Yep.