Family name Tias (Tias 
, تياس) , throughout the world, is quite a common last name. The family name Tias is habitual in Indonesia, where it is quite a rare surname, Spain, where it is a rare surname, and Bangladesh. Not in comparison with a country's population, it is the most numerous in Indonesia, Bangladesh, and Philippines. Likewise, Tias is the forename as well as the last name.