Family name Giyam (Giyam 
) , around the world, is a rare last name. The surname Giyam is habitual in Sub-Saharan Africa, particularly Tanzania, where it is a rare surname, South Africa, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. In absolute terms, this name is the most popular in Tanzania, South Africa, and India. Very seldom, Giyam is the forename as well as the last name.