All over the world, イルワン (Irwan 
, イルワン) is a widespread predominantly masculine, but very infrequently feminine forename. The given name イルワン is habitual in Indonesia, where it is quite a common predominantly boy's, but scarcely female name, Brunei, where it is quite a common masculine name, and Reunion. In absolute terms, it is commonest in Indonesia, Malaysia, and Saudi Arabia. Very seldom, イルワン is the last name as well as the forename.