O Heoghy. A Sept / Family branch, who had their territory in Co. Down in the south - east of the Ulster Province where they were Chiefs.

O Heraghty or O Heraty - Irish / Ua hOireachtaigh. A Sept / Family branch, who had their territory in Co. Galway and Co. Mayo in the south - west of the Connacht Province and in Co. Donegal in the north - west of the Ulster Province. Sometimes used as a synonym with O Geraghty, which see.

Herald. English origins. They were in the Ulster Province where it was used for Harold.

O Heran - Irish / Ua hEarain. A Heremonian Ui Cobhthaigh Dal Cuinn 3 Colla Sept / Family branch, who had their territory in the kingdom of Orghialla / Airghialla / Oriel in Co. Armagh in the south - east of the Ulster Province. See also O Harron. Not connected to O Heron.  Ancestors - *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

O Herane / Ua hUidhrin,  A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Airthir Ui Niallain Clann Cernaich Sept / Family branch, who had their territory at Oneilland East and West in Co. Armagh in the south - east of the Ulster Province. Kinsmen to the O Hanlons / Ui hAnluain, Mac Alindon / Mheic Gilla Fhiondain, O Carney / O Carny / Ua Cearnaigh, Mac Conkeel / Mac Enhill / Woods / Mheic Concaille. O Furey / O Fury / Ua Foirredh, O Hare / O Hair / O Haire / Ua hEoir, O Larkin / O Lorking / O Lorcan / O Lorcayne / O Lurkan / O Lurkayne / Ua Lorcain, O Hagan / O Hegan / O Eakin / O Eaken / Ua hAedhagain, O Moynan / O Monan / O Monane / O Monayne / O Monyne / O Moonan / O Moyne / Ua Muanain, Mac Reevy / Mac Crevey / Mac Greevey / Mheic Riabhaigh, Mac Tinney / Mac Atinney / O Tinney / Mac Tinny / Mac Asheeny / Mheic an tSionnaigh. Ancestors - *89.Niallan, *88.Feicc, *87.Felim / Feidlimid, *86.Fiachrach "Cassain," *85.Murray / Muiredach "Colla da Crioch / Focrith" - of the Two Countries, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

Herbert / Hoireabard, They originally came into Ireland after the Anglo - Norman Invasion, and later still in the 16^th Century AD into Co. Kerry in the south - west of the Munster Province.

Herdman. English occupational origins. They were in Co. Antrim in the north - east of the Ulster Province.

Herdman. English occupational origins. They were in Munster Province and Leinster Province in the 14th Century AD.

Herley. Used as a synonym for Harley, which see, in the Ulster Province.

O Herlihy or O Herilyhy or O Hierlihy. - Irish / Ua hIarlatha - arfhlaith / under lord. An Erenagh Sept / Family branch who were responsible for Irish Catholic Church lands from generation to generation. They had their territory at Ballyvourney in Co. Cork in Desmond / Des Mhumhain / Southern Munster. Some changed to O Hurley.

O Hernon - Irish / Ua hIornain. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Fiachrach Sept / Family branch, who had their territory in the Aran Islands and are now in Co. Leitrim and Co. Galway in Connacht. Ancestor - *87.Fiachra the original 2nd King of Connacht (Ui Fiachrach), *86. Eochy "Mugmedon" the 124th King of Tara / Ireland.

O Hernon - Irish / Ua hEarnain. Used for O Heffernan, which see, in the Munster Province.

O Herr. Used as a variant for O Hehir, which see.

Mac Herren or Mac Herryn -

O Herreran - Irish / Ua hEararain. A Sept / Family branch, who had their territory in Co. Derry in the north - east of the Ulster Province and nearby in Co. Donegal in the north - west of Ulster.

O Hertnon. Used as a variant for O Hernon, which see, in Co. Offaly in the north - east of Southern Leinster. Also changed to O Hehernan there. Hertnam also is a corrupt form of Hertnon.

O Heskin - Irish / Ua hUiscin. A Sept / Family branch, who had their territory in the Connacht Province. Anglicized with several others as Waters due to uisce / water - and occasionally Hoskins. See also Askin.

O Heslin - Irish / Ua hEisleanain . Ui hEislin now used. Anglicized originally as O Heslenan. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin Breifne Sept, who had their territory at Mohill in Co. Leitrim in Northern Connacht. Ancestors -*87.Brion the original 1st King of Connacht (Ui Briuin), *86.Eochy "Mugmedon" the 124th King of Tara / Ireland.

O Hession - Irish / Ua hOisin. A Sept / Family branch, who had their territory in the north of Co. Galway in Southern Connacht and in the south of Co. Mayo in the mid - west of the Connacht Province. Sometimes also changed to Usher. See also Hishon.

O Hester - Irish / Ua hOister. Origins unknown as yet. A Sept / Family branch, who had their territory in Co. Mayo in mid - the west of the Connacht Province.