Surname Sijka (Сийка 
, Sijka 
) , in all the world, is quite a rare cognomen. The last name Sijka is characteristic of Bulgaria, where it is quite a common surname, North Macedonia, where it is quite a rare surname, and Slovakia. Measured by absolute frequency, it is commonest in Eastern Europe, particularly Bulgaria, Poland, and Slovakia. Also, Sijka is the forename as well as the last name.