Family name Oooo (Oooo 
, Оооо 
) , all over the world, is a rare cognomen. The cognomen Oooo is characteristic of Laos, where it is quite a rare surname, Taiwan, where it is a rare surname, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, the name is most common in China, Taiwan, and Laos. Much less frequently, Oooo is the forename as well as the last name.