The most notable members of the Cisman Mahmoud are the Majeerteen Sultanate was based in Baargaal, its historical and prominent sultanate in Somalia during its golden age in the mid-19th to early 20th century Boqor Osman Mahamuud was one of the three prominent rulers of present-day Somalia at the turn of the 20th century. The Sultan of Hobyo, Yusuf Ali Kenadid, who ruled over much of what today is Puntland as far as Hobyo, and his son, Osman Yuusuf Keenadiid, who invented the Osmanya writing script.