Last name Стэф (Stef 
, Стэф) , throughout the world, is quite a common cognomen. The surname Стэф is habitual in Romania, where it is quite a common surname, Iceland, where it is quite a rare surname, and Mauritius. In absolute terms, the name is most common in Romania, France, and Indonesia. More prevalently, Стэф is the forename as well as the last name.