Surname Thaay (Thaay 
) , in the entire world, is a very rare last name. The last name Thaay is habitual in Malaysia, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Brazil. Not in comparison with a country's population, this name is the most popular in Malaysia, India, and Venezuela. More prevalently, Thaay is the forename as well as the last name.