Surname Ywa (Ywa 
) , in the world, is a rare last name. The cognomen Ywa is habitual in South-eastern Asia, particularly Myanmar, where it is quite a rare surname, Malaysia, where it is a very rare surname, and Thailand, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Myanmar, Malaysia, and the United States. Likewise, Ywa is the forename as well as the last name.