Surname Jaena (เจน 
, Jaena 
) , around the world, is quite a rare cognomen. The cognomen Jaena is characteristic of Philippines, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Indonesia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in South-eastern Asia, particularly Philippines, Indonesia, and Thailand. More prevalently, Jaena is the forename as well as the last name.