Cognomen Герас (Geras 
, Герас 
, Gueras 
) , globally, is quite a rare last name. The family name Герас is characteristic of Greece, where it is quite a common surname, Malaysia, where it is quite a rare surname, and Lithuania. Not in comparison with a country's population, it is the most numerous in Greece, Malaysia, and Philippines. Also, Герас is the forename as well as the last name.