The name Tanith is a girl's name of Ancient_Languages/Civilizations origin. Tanith and is often added to lists like Mythological Baby Names for Girls and discussed in our forums with posts like "Pick 5 (GIRLS)".
From the experts:
Name of the Phoenician deity who was the patron of Carthage, goddess of the moon, and a fertility figure. Variations include Tanit, Tanis, and Tanitha. The name is frequently misinterpreted to be an Irish name meaning "estate." Despite this august heritage, the original form of the name is a bit lispy for use in modern English-speaking lands.