Probably related to Nathan or Nathalie forms; the Nathan root means "he gave" or "gift."
Nathia is probably related to Nathan or Nathalie forms, with the Nathan root meaning he gave or gift. That places it near the family of biblical names associated with generosity and divine provision, even if the exact spelling is modern.
The name feels soft, modern, and adaptable. Its shortness makes it easy to use, while the ending gives it a gentle, feminine finish. In modern naming, Nathia reads as rare, lightly spiritual, and composed of familiar sounds arranged in a fresh way.