Family name Касуя (Gizo 
, Kasuya 
, Касуя 
) , around the globe, is quite a rare cognomen. The surname Касуя is habitual in Georgia, where it is quite a common surname, Ghana, where it is a rare surname, and Thailand. In absolute terms, the name is most common in Georgia, Nigeria, and Ghana. Also, Касуя is the forename as well as the last name.