Cognomen 吉亚 (Jiya 
, 吉亚 
) , across the world, is a common family name. The cognomen 吉亚 is characteristic of Nigeria, where it is quite a rare surname, Malawi, and Oman. In absolute terms, it is the most numerous in Nigeria, India, and Malawi. More prevalently, 吉亚 is the forename as well as the last name.