Roscommon (barony)

[7] The Mag Oireachtaigh (Mageraghtys) were rulers here of Clann Tomaltaigh and the Muintir Roduib.

The Ó Maoilbhreanainn (O'Mulrenan) sept were chiefs of Clann Chonchobhair (O'Conor).

It is referred to in the topographical poem Tuilleadh feasa ar Éirinn óigh (Giolla na Naomh Ó hUidhrín, d. 1420): OMaoilbrenaiin co mbladaiḃ Ar Cloinn clármaoith Conċoḃair A maicne os gaċ droing do dliġ An aicme do Cloinn Chathail.

[...] Ag Mág Oireaċtaiġ na n-each Muintir Roduiḃ na righḃreaṫ ("O'Maoilbhrenainn with fame over the irriguous plain of Clann-Conchobhair, Their children are entitled to be above every tribe, that sept of the Clann-Cathail.

[...] To Mac Oireachtaigh of the steeds belong Muintir Roduibh of royal judgments.