Family name Ройгас (Roygas 
, Ройгас 
, Roigas 
) , worldwide, is a rare last name. The cognomen Ройгас is characteristic of Northern Europe, particularly Estonia, where it is quite a common surname, Latvia, where it is a rare surname, and Norway, where it is a very rare surname. In absolute terms, it is the most numerous in Estonia, Russia, and Latvia.