Globally, ミリア (Milia 
, ミリア 
, Milliat 
) is quite a rare predominantly feminine, but very infrequently boy's first name. The forename ミリア is characteristic of Greece, where it is quite a common girly name, Maldives, where it is quite a rare feminine name, and Lebanon. In absolute terms, it is commonest in Greece, the Democratic Republic of the Congo, and Lebanon. Likewise, ミリア is the last name as well as the forename.
ミリア is also a name for the fictitious and mythical characters: Milia Fallyna Jenius , the fictional character from Super Dimension Fortress Macross, Macross: Do You Remember Love? and Milia , the theatrical character in the play "Fortounatos".