» For Tattoos, also called "tats" see, Tattoo. The Tat are an Middle Persian-speaking ethnic group in the Caucasus. The Muslim Tats are considered an Iranian ethnic group in the Caucasus and the Jewish Tats have adopted the language of Tati in ancient times. The Tats speak a southwest Iranian tongue called Tati, which is also referred to as Tat-Persian by some linguists. The Tats descend from Persians that moved into the Caucasian mountains in the 5th and 6th centuries. The majority of the Tats… (More on Tats)