Cognomen 우자 (Ujah 
, 우자 
) , all around the world, is quite a common surname. The family name 우자 is characteristic of Nigeria, where it is quite a rare surname, Afghanistan, where it is a rare surname, and Malaysia, where it is a very rare surname. In absolute terms, it most frequently occurs in Nigeria, Afghanistan, and India. Likewise, 우자 is the forename as well as the last name.