Family name Deán (Decem 
, Deien 
, Deán 
) , globally, is a rare last name. The surname Deán is characteristic of Myanmar, where it is a rare surname, the United States, where it is a very rare surname, and Philippines, where it is an extremely rare surname. In absolute terms, it is commonest in Myanmar, the United States, and China. More prevalently, Deán is the forename as well as the last name.