Cognomen Greyner (Greyner 
, Грейнер 
) , in the entire world, is a rare surname. The cognomen Greyner is habitual in Nicaragua, where it is a rare surname, Venezuela, and Belarus, where it is a very rare surname. Measured by absolute frequency, the name is most common in Russia, Venezuela, and Ukraine. Much less frequently, Greyner is the forename as well as the last name.