Surname Thuya (Thuya 
, Tuia 
) , throughout the world, is a common family name. The family name Thuya is characteristic of Myanmar, where it is quite a common surname, Guam, and New Zealand, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Myanmar, Malaysia, and the United States. Likewise, Thuya is the forename as well as the last name.