Cognomen Тира (Tira 
, Tyra 
, Тира 
) , throughout the world, is a widespread surname. The surname Тира is characteristic of India, where it is quite a common surname, Moldova, where it is quite a rare surname, and Romania. Measured by absolute frequency, it is the most numerous in India, Indonesia, and the United States. Very seldom, Тира is the forename as well as the last name.