Last name Тийу (Tiiu 
, Тийу 
) , worldwide, is a very rare cognomen. The family name Тийу is characteristic of Israel, where it is a very rare surname, Malaysia, and Russia, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Malaysia, India, and Israel. Much more prevalently, Тийу is the forename as well as the last name.