Medieval Surnames

[Tartaros]

Over here in SKOAHTLAND, we used to have a system of heraldry, and before that, governance, in clans, that was only abolished in the 18th century with a history going back centuries. You might be able to find some common British surnames from them. Hell, I myself am actually a descendant of Clan Gunn. "Aut pax aut bellum!", sounds pretty intimidating eh?

https://en.wikipedia.org/wiki/Scottish_clan
https://en.wikipedia.org/wiki/List_of_Scottish_clans