Surname アダ (Ada 
, Adda , Adah 
) , in the world, is a widespread last name. The cognomen アダ is habitual in Honduras, where it is a common surname, Equatorial Guinea, and Nicaragua, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Nigeria, India, and Mexico. Also, アダ is the forename as well as the last name.