I notice that UESP refers to a 'House Rilis' in their Firsthold article (
https://en.uesp.net/wiki/Lore:Firsthold), which baffles me because we know of a "High Kinlord Rilis XIII" from Auridon's storyline. The name of this NPC would tell me that 'Rilis' is in fact a first name, not a surname. If it was indeed a surname then this High Kinlord's name would be 'Rilis XIII Rilis', or 'Rilis the thirteenth of his name of House Rilis'. So is this just a quirk of Altmeri naming? Did ZOS screw something up? Or is UESP inaccurate in claiming that the noble House's name is 'Rilis'?
(for the sake of this question of mine lets also ignore the fact that the NPC should
NOT even have 'XIII' or any other numerals attached to his name because he is
not a king. We don't see High Kinlady Estre going around labelling herself Estre II or VI. Yes, yes, I know that Firsthold and the other High Kinlordships used to be Kingdoms in their own right, but they aren't anymore, not in the time of ESO at least.)