Family name Lonji (Lonji 
) , worldwide, is a rare cognomen. The cognomen Lonji is characteristic of the Democratic Republic of the Congo, where it is a rare surname, South Africa, where it is a very rare surname, and Malaysia. In absolute terms, this name is the most popular in the Democratic Republic of the Congo, South Africa, and the United States. Much less frequently, Lonji is the forename as well as the last name.