Irish pedigrees; or, The origin and stem of the Irish nation (1892), by John O'Hart, - Volume: 1, pg.555, it says, quote; "No.110 Diarmuid; second son of Donoch Maol-na-mBo; was the 47th Christian King of Leinster, and the 177th Milesian Monarch of Ireland; was slain on the 23rd Feb., 1072, at Odhba, near Navan; m. Darbhforgal (d. 1080), grand-daughter of the Monarch Brian Boromha." Internet Archive direct link; https://archive.org/stream/irishpedigreesor_01ohar#page/555/mode/1up
