Last name Hsai (Hsai 
) , in the entire world, is quite a rare cognomen. The last name Hsai is characteristic of South-eastern Asia, particularly Myanmar, where it is quite a rare surname, Malaysia, where it is a rare surname, and Thailand, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Myanmar, Malaysia, and the United States. Also, Hsai is the forename as well as the last name.