If no one directly asked, he doesn't really explain. At most he'd tell you that Fishbones isn't his surname, that's more of a nickname he's gain for his penchant for eating fish bones. Searock is also not really part of his official name, though this one he does say his family gave him because of his affinity towards seafaring over mountaineering. Kulee at least is his actual given name, but what his family name and his clans is, he has not openly divulged.