While making Life of Seiros, I faced a situation probably different from what other people in this thread experienced. Rather than solely add name references of my own, I also had to integrate some of my characters into already existing name references, carried over from Three Houses.
It might seem boring or even negative, but honestly, it was fun - working with existing references made the characters I made feel more authentic. So, the original Nabateans I included in the prologue have names from Irish mythology, much like the Four Saints in canon - Balor, leader of the Fomorians; Fionn (Mac Cumhaill), hero of the Fenian Cycle, etc. Both are reimagined as Nabateans. Weapons which are intended to be specifically Nabatean-made have names drawn from Irish or Scottish Gaelic - Claidheamh, Beannacht, Fuath and so on.
Through these references, I also included an unmentioned one. Besides Rhea, the two temporarily playable Nabateans you get in the prologue are Macha and Neamhan, her two childhood friends. In Irish mythology, while the actual names of the trio seem to be in dispute, Neamhan (Nemain) and Macha are two goddesses who are part of a trio of sisters, the three Morrígna. The third, unmentioned sister (who, as you can probably tell, is where Rhea fits), Badb or Morrígan herself, is the goddess of war, terror and discord, the one who incites mortal men to war and bloodshed, and Rhea… well, you get the idea.
On the other side, Anacharsis borrows from the same source as the canon Agarthans - the Seven Sages of Greece. Orpheus does not, and this is a hint to someone keen-eyed that they’re not an “ordinary” Agarthan.
Humans, of course, do not have to follow any canon standards for names, but I did have some fun with them. Most of the enemy bosses in the hack are named after French generals or other notable soldiers in World War I. The most famous, like (Philippe) Petain, (Ferdinand) Foch or (Maurice) Gamelin are late in the game, but others are still notable - and honestly, from their names you can probably tell that something is amiss. No hackrom dev would name one of their bosses “d’Esperey” without something being amiss.
These bosses, as part of the Army of South Fodlan, fight against Wilhelm, whose two most loyal knights whom he starts with on chapter 1 are Paul (von Hindenburg) and Erich (Ludendorff). It’s all a World War I metaphor!