Surname ג'ף (Jeff 
, Geoff , Jef ) , around the globe, is a common family name. The cognomen ג'ף is habitual in Brunei, where it is quite a common surname, Luxembourg, and Macao. Measured by absolute frequency, it most frequently occurs in Kenya, Indonesia, and Nigeria. More prevalently, ג'ף is the forename as well as the last name.