If you want to stay true to lore, male Xaela names are Mongolian forename with Tribe as last name.

Look at baby name lists like https://www.momjunction.com/baby-names/mongolian/ for a first you like.

Tarkhan, Taban both seem close to Terin. Tarkhan seems like pretty nice name actually, with the meaning "He who is skillful". Likely shorted by friends to Tar or Tark, neither of which are bad.

Do you know your tribe? https://forum.square-enix.com/ffxiv/...ng-Conventions has a list of them in the Xaela section.