Surname Бісу (Bisu 
, Бісу 
) , in the entire world, is quite a rare last name. The surname Бісу is habitual in Romania, where it is quite a rare surname, Qatar, where it is a rare surname, and United Arab Emirates. Not in comparison with a country's population, this name is the most popular in India, Romania, and Bangladesh. More frequently, Бісу is the forename as well as the last name.