Last name Runji (Runji 
, 润基 ) , in the entire world, is a rare cognomen. The last name Runji is characteristic of Sub-Saharan Africa, particularly Kenya, where it is a rare surname, Tanzania, and Nigeria, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Kenya, Tanzania, and China. Also, Runji is the forename as well as the last name.