Surname เซียร่า (Siera 
, Seara 
, Sieara 
) , in all the world, is quite a common family name. The last name เซียร่า is characteristic of Portugal, where it is quite a rare surname, Uruguay, and Argentina. In absolute terms, it is commonest in Brazil, Portugal, and Indonesia. Also, เซียร่า is the forename as well as the last name.