Mong* Finn NicFideach O'HAILILL (Abt 340 - ____)
Flaithnia* MacFiangalaich O'HAMALGAD (770 - ____)
Fiangalach* MacFlann O'HAMALGAID (730 - ____)
Maenach* MacFlaithnia O'HAMALGAID (821 - ____)
Blatact* MacLabraid O'HENNA (Abt 330 BC - ____)
Eochaid Airem MacFionn O'HENNA (____ - ____)
Fionnloch MacRogen O'HENNA (Abt 240 BC - ____)
Rogen* Ruadh MacEsamon O'HENNA (Abt 270 BC - ____)
Joan* O'KESTON (Abt 1238 - ____)
Sir Knight Alexander* O'KESTON (Abt 1211 - ____)
Maelcorcre ingen Dunlaing O'MUIREDAIG (____ - ____)
Ailill* O'MUIREDAIG (King of Leinster) (____ - 871)
Augaire* O'MUIREDAIG (King of Leinster) (____ - 917)
Bran* Ardchenn O'MUIREDAIG (King of Leinster) (____ - 795)
Dunkaing* O'MUIREDAIG (King of Leinster) (____ - 869)
Dunlaing* O'MUIREDAIG (King of Leinster) (920 - 1014)
Muiredach* O'MUIREDAIG (____ - ____)
Tuathal* O'MUIREDAIG (King of Leinster) (____ - 958)
More* O'MULLOY (____ - ____)
Aine* NicFinn O'NUADU (200 - ____)
Ragnailit Raduplha* O'OLAF (Abt 1031 - Abt 1058)
Donncuan* O'TOOLE (____ - ____)
Donncuan* O'TOOLE (King of Leinster) (____ - 1016)
Gilla Coemgin* O'TOOLE (____ - 1059)
Gilla Comgaill* O'TOOLE (____ - 1041)
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