This girl's name is used in German, Dutch, Serbian and Croatian.
The name Tanja ranked 2133rd in popularity for females of all ages in a sample of the 1990 US Census.
This name is based on an ancient Roman family name, Tatius, whose meaning has been lost.
A king by this name was said to have reigned over the Sabines and the Romans in cooperation with the legendary Romulus. This suggests that the name pre-dates even the founding of Rome, and may have its ultimate origins in the Etruscan language.