Family name 希雅 (Sia 
, 希雅 
) , all around the world, is a common cognomen. The cognomen 希雅 is characteristic of Malaysia, where it is quite a common surname, Brunei, and Cayman Islands (explore the name in all countries). Not in comparison with a country's population, the name is most common in South-eastern Asia, particularly Malaysia, Philippines, and Indonesia. Likewise, 希雅 is the forename as well as the last name.