Last name Borisas (Borisas 
, بوريس 
, Борисас 
) , across the world, is a rare cognomen. The family name Borisas is habitual in Lithuania, where it is quite a rare surname, Yemen, where it is a very rare surname, and Kazakhstan. Measured by absolute frequency, it is the most numerous in Lithuania, Russia, and Yemen. Likewise, Borisas is the forename as well as the last name.