Diminutive or short form of Tatiana, Tatiane, Tatjana and Tatyana. For Georgian, this only applies when the name is written as ტატი.When Tati is written as თათი in Georgian, it is a diminutive or short form of the common feminine names Tamar, Tamta, Tatia and Tatuli.Also compare the related names Tata 2 and Tato.