• Agnew
• Alexander
• Mac Allister (from Scotland)
• Mac Ardle
• Bird (see Mac Neny)
• Boylan
• O Brassil
• Mac Brock
• Brody (see Coleman of Orgiall)
• Mac Cabe, chiefs of Monaghan, and Cavan
• Calkins (see Colcan)
• O Callaghan (of Oriel)
• Cairns (page 374)
• Mac Cann, lords of Clanbrassil
• Carbery
• O Carroll, princes of Oriel or Louth
• Cassidy, chiefs of Coole
• Mac Clean (from Scotland)
• Colcan (pages 608, 389)
• Coleman of Orgiall (pages 371, 383)
• Connolly, chiefs in Fermanagh
• O Connor of Orgiall (page 639)
• Corrigan
• Corry
• Cosgrave (see Mac Oscar)
• Culkins (see Colcan)
• Mac Cusker (see Mac Oscar)
• Mac Daniel
• Davin, Davine
• Devers
• Devin, lords of Fermanagh, Devine
• Divers
• Mac Donald and Mac Donnell, Lords of the Isles and chiefs of Glencoe
• Donegan
• Donelan
• Mac Donnell, of Antrim (from Scotland)
• Mac Donnell, of Clankelly, in Fermanagh
• Donnelly
• Mac Dougald, Mac Dougall, and Mac Dowell (from Scotland)
• O Duffy
• O Dwyer
• Eagan, Mac Egan
• Mac Elligott (anglicised "Elliott," from Scotland)
• Enright
• Mac Evoy (pages 565-566; Mac Evoy, Mac Veagh, and Mac Veigh are the anglicised forms of the ancient Mac Uais who were distinguished chieftains in the territory now known as the barony of "Moygoish," in the county Westmeath.)
• Feehan (see Lane of Ulster)
• O Flanagan, lords of Tura, in Fermanagh
• Flinn
• Fogarty (of Ulster)
• Garvey
• Gilchreest
• Mac Gilfinan, lords of Pettigoe
• Mac Gilmichael
• Mac Gilmore, chiefs in Down and Antrim
• Goff, Mac Gough, Mac Geough
• Mac Grath, chiefs in Fermanagh
• Mac Hale
• O Hanlon, lords of Orior, in Armagh, and Royal standard bearers of Ulster
• O Hanratty (anglicised "Enright")
• O Hart, princes of Tara, lords of Teffia, and chiefs in Sligo
• Healy
• Heany (see Mulrooney)
• Higgins
• Hodges (see Coleman of Orgiall)
• Holland
• Holligan
• Hoolahan
• Hopkins (see Coleman of Orgiall)
• Hort
• Howard (of England)
• Mac Hugh
• Mac Ivir, Mac Ivor
• Kearns (see Cairns)
• Keenan, chiefs in Fermanagh
• O Kelly, princes and lords of Hy-Maine, a territory in Galway and Roscommon
• Mac Kenna, chiefs of Truagh in Monaghan
• Kennedy
• Kern (see Cairns)
• Keogh
• Kieran (see Cairns)
• Lally
• Lane of Ulster (pages 513, 670)
• Lannin
• Larkin
• Laury
• Lavan
• Lawlor, Lalor
• Leahy, chiefs in Hy-Maine, a territory in Galway and Roscommon
• O Loghan, O Loghnan
• Loftus
• Looney
• Lynch
• Madden, lords of Siol Anmcha or Silancha, which ancient territory comprised the present barony of Longford, in the county Galway, and the parish of Lusmagh on the other (Leinster) side of the river Shannon, near Banagher, in the King's County
• Magee, chiefs in Down and Antrim
• Magrath
• Maguire, princes and lords of Fermanagh, and barons of Enniskillen
• Mac Mahon, princes of Monaghan, lords of Farney, and barons of Dartry, at Conagh, where they held their chief seat (The MacMahons were sometimes styled Princes of Orgiall, and several of them changed their names to "Matthews")
• Malone
• Mac Manus, chiefs in Fermanagh
• Matthews, see Mac Mahon
• Meldon (see Muldoon)
• Mitchell (see O Connor of Orgiall)
• Monaghan (see O Connor of Orgiall)
• Mooney
• Muldoon (anglicised "Meldon"), chiefs of Lurg
• Mullally
• Mulrooney (pages 818, 672)
• Muregan
• Naghtan and Norton, chiefs in Hy-Maine, a territory in Galway and Roscommon
• Nawn
• Neillan
• Mac Neny, O Neny (anglicised "Bird")
• Mac Oscar and Mac Osgar (anglicised Mac Cusker and Cosgraye), who, according, to O'Dugan, possessed a territory called Fearra Hois (signifying the "Men of Ross"), which comprised the district of Magheross about the town of Carrickmacross, in the county Monaghan, with the parish of Clonkeen, adjoining, in the county Louth
• Oulahan
• Ouseley
• Pigeon (see Coleman of Orgiall)
• Mac Quillian, powerful chiefs in Antrim
• Roberts (see Mac Evoy)
• Roderick (see Coleman of Orgiall)
• Rogan
• Rogers (see Mac Rory)
• Ronan, Ronayne
• Mac Rory (anglicised "Rogers")
• Saunders, Saunderson
• Shannon (see O Connor of Orgiall)
• Mac Sheehy
• Slevine
• Mac Tague (anglicized Montague)
• Mac Ternan (see Mac Tiernan)
• Mac Tiernan (page 565)
• Mac Tully
• Mac Uais (see Mac Evoy)
• Mac Veagh and Mac Veigh (see Mac Evoy)
• Wesley