In all the world, Tieo (Tieo 
) is a very rare predominantly masculine, but scarcely girly forename. The first name Tieo is habitual in Greece, where it is a rare epicene name, South Africa, where it is a very rare predominantly boy's, but scarcely feminine name, and China, where it is an extremely rare boy's name. Very seldom, Tieo is the last name as well as the forename.