Tannis is a name of Greek origin, derived from the word 'tanasis', which means 'from Tanagra'. Tanagra was an ancient city in Greece, known for its pottery and figurines. The name Tannis has been used historically as both a given name and a surname, although it is more commonly found today as a female given name.
The name Tannis appears to have been quite popular among parents from the mid-40s to the late 70s and early 80s, with peaks in popularity during certain years. However, its usage has since declined significantly.