Hello and welcome Lawetz,
The generators that we can used are focused on give an idea of the lore names/surnames from each tribe to help the people playing in a inmersive game.
Even so, you can choose another that you like too if it follow the name/surname rules. That is also applied for the domains and settlement as you can see here.
We only know a few NPC names fromt he Lore, like Anara Starsong (neran), Ylva or Ingvar or Bethemel (brudvir), Jaleh (waerd), Ilnajeren (Dras) and Naomi Jade what is belived to be a mydarri.
As you can see, the names are not as complicated as the surname/domain&settlement generator seems, but it is true that we will find another names more complicates for NPCs.