Cognomen รก (Rok 
, รก 
, Plobrung ) , throughout the world, is quite a common surname. The last name รก is habitual in Slovenia, where it is quite a common surname, Qatar, where it is quite a rare surname, and Algeria. Measured by absolute frequency, this name is the most popular in Northern Africa, particularly Algeria, Egypt, and Morocco. Also, รก is the forename as well as the last name.