Mahamud Ibrahim Adeer (Somali: Maxamuud Ibrahiim Adeer, Arabic: محمود ابراهيم) sometimes referred to as Aw Maxamuud was a Somali ruler. He was the second Sultan of the Sultanate of the Geledi. He defeated early challengers to the new Sultanate and incorporated some Rahanweyn and Hawiye subclans under Geledi rule.