Cognomen ضيوف (Diouf 
, ضيوف 
, Diuf ) , across the world, is a widespread family name. The last name ضيوف is habitual in Sub-Saharan Africa, particularly Senegal, where it is a prevalent surname, Gabon, where it is quite a common surname, and Gambia. In absolute terms, the name is most common in Senegal, France, and Ivory Coast. Very seldom, ضيوف is the forename as well as the last name.