Cognomen Titii (Titii 
, Tiii 
) , around the globe, is a rare surname. The family name Titii is habitual in Algeria, where it is a rare surname, Morocco, where it is a very rare surname, and France, where it is an extremely rare surname. In absolute terms, it is the most numerous in Algeria, Morocco, and India. Also, Titii is the forename as well as the last name.