Family name Сайф (Sayf 
, Сайф 
) , globally, is quite a common last name. The surname Сайф is habitual in Northern Africa, particularly Morocco, where it is quite a rare surname, Algeria, and Tunisia. Measured by absolute frequency, it most frequently occurs in Northern Africa, particularly Morocco, Algeria, and Egypt. Likewise, Сайф is the forename as well as the last name.