Do- Do people know that "Of Aedes Elysiae" essentially works as a surname? It's important to me that people know that.
For some context, that's how many "full titles"/epithets worked in Greek epics. For example, "Helen Of Troy", or "Agamemnon Of Mycenae". Although necessary extra, Helen Of Troy/Sparta is more of a convertion, but the point stands.
For the person who asked this and anyone who wants a fun fact with some historical inaccuracies:
What I meant when I said this is not that your place of origin is your literal surname, but it worked as distinguisher. Just like surnames. And in many epics, they were also used to "artificially" keep the poem's pattern and structure (just like "Swift Footed Achilles"). In epics, these epithets where usually standard and static for the character in question.
The way Phainon uses it, it metatextually evokes those epics, and it also sets him as an outsider.
He is acknowledging through it that Okhema is not his place of birth. He is a refugee and an immigrant, which were also pretty important facts in actual Greece. Particularly Athen, the place Okhema is based on. That is because people who weren't Athenians were considered to be "lesser" than an actual born citizen.
Although in Phainon's particular case, what he is likely brining attention to is the fact he is far away from home, but still won't leave it behind.
So, what Phainon's "Of Aedes Elysiae" does is: Metatextually connect him to epic figures, distinguish him as a person, and mark that he's an outsider.
Since you used Castrum Kremnos, I will use in my following example Castrum Kremnos too:
Mydei is Mydeimos when he is in Kremnos, not only because obviously he's a king/crown prince, but because being of CK isn't something new. Instead people would know him as Mydeimos Son Of Eurypon. Which in this context would once again work as a surname in the way of differentiating this Mydeimos from all other Mydeimos.
When he is outside of Kremnos, he would still likely be called Mydeimos Son Of Eurypon (or in his case, as we have in game evidence, "The Son of Gorgo". We can understand Mydei's surname canonically is Mydeimos Son Of Gorgo, instead of the common use of the father's name. This is the "equivalent" for us of him changing his surname to his mother's). But in an epic, it would also be perfectly valid to call him Mydeimos Of Castrum Kremnos.
Or for example, Phainon once more. If Phainon had stayed in Aedes Elysiae, he'd have been known as Phainon Son Of Hieronymus.
Point is: Is your character an outsider/not in their place of birth? Their place of birth would be perfectly fine, and evoke actual epics, however it is making an emphasis on their status an outsider. Are they in their place of birth/there is not an intention to bring attention to their status as an outsider? The father's name is commonly used.
