Family name Opu (Opu 
) , in the world, is a common last name. The cognomen Opu is characteristic of Bangladesh, where it is quite a common surname, Oman, where it is quite a rare surname, and Papua New Guinea. Not in comparison with a country's population, this name is the most popular in Bangladesh, Indonesia, and Papua New Guinea. Likewise, Opu is the forename as well as the last name.