The name "Zantia" is likely of Greek origin, derived from the Greek word "zanthos" meaning "golden".
While Hawaiian language is rich with beautiful words and meanings, there is no known connection between "Zantia" and any Hawaiian terms or concepts.
If you are looking for a Hawaiian name with a similar meaning, "Kauʻi" could be a good option, as it means "golden" or "yellow".
Ultimately, the meaning you assign to a name is up to you and your personal preferences.