Family name Серго (Sergo 
, Серго 
) , in the world, is a common cognomen. The surname Серго is habitual in Georgia, where it is a common surname, Armenia, where it is quite a common surname, and Croatia, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Georgia, Armenia, and Russia. Also, Серго is the forename as well as the last name.