In all the world, Twa (Toi 
, Twa 
) is quite a common epicene first name. The first name Twa is habitual in Vietnam, where it is quite a rare principally boy's, but very infrequently feminine name, Algeria, where it is a rare unisex name, and the United States, where it is a rare predominantly feminine, but very infrequently boy's name. Not in comparison with a country's population, it is commonest in Vietnam, the United States, and India. Also, Twa is the last name as well as the forename.