Cognomen 초아 (Choa 
, 초아 
) , worldwide, is quite a rare last name. The surname 초아 is characteristic of South-eastern Asia, particularly Singapore, where it is quite a common surname, Malaysia, where it is quite a rare surname, and Philippines. Measured by absolute frequency, it is the most numerous in Philippines, Bangladesh, and Indonesia. Much less frequently, 초아 is the forename as well as the last name.