Surname دیان (Diagne 
, دیان) , around the globe, is a widespread cognomen. The last name دیان is habitual in Sub-Saharan Africa, particularly Senegal, where it is a widespread surname, Mauritania, where it is quite a common surname, and Gabon, where it is quite a rare surname. In absolute terms, the name is most common in Senegal, France, and the Democratic Republic of the Congo. Much less frequently, دیان is the forename as well as the last name.