Cognomen สมสา (Samasa 
, สมสา , Somsa 
) , throughout the world, is quite a rare surname. The cognomen สมสา is habitual in Sub-Saharan Africa, particularly Seychelles, where it is quite a common surname, Gambia, and Gabon, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Thailand, India, and Gambia. More frequently, สมสา is the forename as well as the last name.