Cognomen Rapii (Rapii 
, Рапий 
) , all around the world, is a rare last name. The family name Rapii is characteristic of South-eastern Asia, particularly Malaysia, where it is a rare surname, Indonesia, and Singapore, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Indonesia, Malaysia, and Russia. Likewise, Rapii is the forename as well as the last name.