Yes it's Somali and it means original. It stems from the root word Mir wich is where plants and life originates. It's similar to Afro Asiatic languages forinstance Amir in Arabic is where the order originates. So I think those European languages have had Afro Asiatic influences. Another example is Dir wich means the land of the origin. So all the Somali tribes that lived in western Somali referred to themself Dir.
Mire —someone born in the late hours of the night . Loosely similar to Hiraab , Galab and Guure.
More examples of traditional Somali names
Gadiid , Hurre —names for the dark skinned male babies
Rooble,Kaliil ,Jiilaal, Dayr,Barwaaq—-names influenced by the seasons and the weather
Geedi ——Born in the midst of pastoral migration.
Cadaawe,Coldoon,Colaad —born in a wartime.