Globally, Йеф (Jef 
, Йеф) is quite a common masculine first name. The forename Йеф is characteristic of Aland Islands, where it is quite a common male name, Belgium, and Netherlands, where it is quite a rare masculine name. In absolute terms, it most frequently occurs in Belgium, Indonesia, and the United States. Much less frequently, Йеф is the last name as well as the forename.
Йеф is also a name for the fictitious and mythical characters: Jef Alberts , character in Goede tijden, slechte tijden; Jef Pedal , character in The Adventures of Nero; Jef Kazak , the fictional character; Jef Liefooghe and Jef Blaaskop , character in Spike and Suzy, among other works.