Cognomen Danju (丹菊 
, Danju 
) , worldwide, is a rare family name. The cognomen Danju is characteristic of Nigeria, where it is a very rare surname, China, and Philippines, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in China, Nigeria, and India. More prevalently, Danju is the forename as well as the last name.