Cognomen Upir (Upir 
, Упир 
) , throughout the world, is a rare surname. The family name Upir is characteristic of Ukraine, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Kyrgyzstan. Measured by absolute frequency, it is commonest in Ukraine, Russia, and Nigeria. Much less frequently, Upir is the forename as well as the last name.