Last name ヤヤ (Yaya 
, Jahjah 
, ヤヤ 
) , all around the world, is a widespread cognomen. The cognomen ヤヤ is habitual in Cameroon, where it is a common surname, Gabon, where it is quite a common surname, and Algeria (explore the name in all countries). In absolute terms, it is commonest in Nigeria, Cameroon, and India. Also, ヤヤ is the forename as well as the last name.