Cognomen ثيو (Theo 
, Teo , Théo 
) , all over the world, is a widespread surname. The surname ثيو is habitual in Singapore, where it is a widespread surname, Brunei, where it is a common surname, and British Virgin Islands (explore the name in all countries). In absolute terms, the name is most common in South-eastern Asia, particularly Singapore, Malaysia, and Indonesia. More prevalently, ثيو is the forename as well as the last name.