Family name Dairu (Dairu 
, 代儒 ) , around the world, is quite a rare last name. The cognomen Dairu is characteristic of Nigeria, where it is quite a rare surname, Cameroon, where it is a rare surname, and Singapore. Not in comparison with a country's population, it is the most numerous in Nigeria, Cameroon, and Indonesia. Likewise, Dairu is the forename as well as the last name.