thorny and Wavewright, I think both are correct. The seagull mage Vaino, if I remember correctly, refers to Surma as a troll, that is, the base form from which it developed was a human. But the name of Surma, given by humans referring to it, refers to the symbolic embodiment of violent death. There seems to be a usage of giving individual personal names to the really heavy-duty monsters, as was done for the bear beasts?