Surname Ругая (Rugaya 
, Rugaia 
, Rugaja 
) , all over the world, is quite a rare family name. The family name Ругая is characteristic of Latvia, where it is quite a rare surname, Georgia, where it is a rare surname, and Indonesia. Measured by absolute frequency, it is commonest in Indonesia, Tanzania, and Latvia. Likewise, Ругая is the forename as well as the last name.