O Halliman. A Sept / Family branch, who had their territory in Co. Limerick in the mid - north - west of Thomond / Tuaiscert Mhumhain / Northern Munster where they were Chiefs.

O Hallinan - Irish / Ua hAilgheanain - ailghean / noble offspring. A Sept / Family branch, who had their territory in Co. Waterford, Co. Tipperary and Co. Limerick in the Munster Province. They were the Chiefs of Ballyhallinan in the Barony of Pubblebrien with the Mac Sheehys. Some also changed to Hanlon and Allen.

O Hallion or O Hallin - Irish / Ua hAilin - ail / noble or rock. A Sept / Family branch, who had their territory in Ormond / Aur Mhumhain in Co. Tipperary in the north - east of the Munster Province. Some also changed to Allen.

O Hallissy - Irish / Ui hEolusa, An Irian Conmaicne Rein Muinter Eolais Tellach Cearbhallan Sept / Family branch who were kinsmen to the O Beglin / O Beglan / O Beglain / O Begnal / O Beglane / O Biglane / O Beglen / O Begllin / O Biglan / O Beglyn / Ui Beigleighinn, O Boden / Ui Bardain, O Curnin / O Curnan / O Curnen / Ui Cuirnin - Ollamh, O Mulvey or O Mulveagh / Ua Maoil Mhiadhaigh, O Murray / O Morie / O Morra / O Morrie / O Morey / O Mory / O Murry / O Murrie / Ui Muiredaigh, O Mulhooly / O Mulhooghley / O Mulooley / O Hoogley / Ui Maoil Ghuala, Mac Mullock / Mac Meelick / Mac Moleg / Mac Moolick / Mac Mullicke / Mac Mulock, who had their territory at Mohill and Leitrim in Co. Leitrim in Northern Connacht. Ancestors - *Fine, *Cumscrach, *37.Ir. (Irians).

O Hallisey - Irish / Ua hAilgheasa - ailgheas / eagerness. A Sept / Family branch, who had their territory in Co. Cork in the west of Desmond / Des Mhumhain in Southern Munster and adjacent territory in the south of Co. Kerry in Iar Mhumhain in the south - west of Munster.

O Halloran - Irish / Ua hAllmhurain - allmhurach / sea pirate / stranger. A Heberian Dal gCais Ui Caisin Sept / Family branch, who had their territory between Tulla in Co. Clare in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster where they were the Chiefs of Fay Ui Hallurain and kinsmen to the Mac Namaras. Ancestors  - *92.Caisin (Ui Caisin), *91.Cas (Dal gCais) the King of Thomond.

O Halloran - Irish / Ua hAllmhurain. A Sept / Family branch, who had their territory in Co. Galway in Southern Connacht where they were the Chiefs of Clann Fhearghail in the O Flaherty and O Halloran territory there.

O Halpeny or O Halfpenny - Irish / Ua hAilpine - alp / lump. The same as Halpin, but in a different location. A Sept / Family branch, who had their territory in Co. Monaghan in Southern Ulster.

O Halpin - Irish / Ua hAilpin. A Sept / Family branch, who had their territory in Co. Limerick in the mid - north - west of Thomond / Tuaiscert Mhumhain / North West Munster.

O Haltaghan - Irish / Ua Haltahan. Used as a variant for O Hultahan, which see. A Sept / Family branch, who had their territory in the Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin kingdom of Breifne in Co. Leitrim in Northern Connacht and the adjacent territory in Co. Fermanagh in the south - west of the Ulster Province. See also - Halton.

Halton. English toponymic origins. Used for O Haltahan, which see, in the Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin kingdom of Breifne in Co. Leitrim in Northern Connacht and adjacent territory in Co. Fermanagh in the south - west of the Ulster Province as a variant also of Hultahan, which see.

O Halvey - Irish / Ua hAilmhic - ailmhic / noble son. A Sept / Family branch, who had their territory in Co. Galway and the adjacent territory in Co. Mayo in the southern mid - west of the Connacht Province.

Halvey. English origins. Used as a synonym for Holloway, which see, in the Leinster Province.

Haly. A variant used by the Hanleys, which see who were in Co. Limerick in the mid - north - west of the Munster Province.

O Hamill - Irish / Ua hAghmaill. A Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Cenel nEogain Cenel Binnigh Teallach Duibhbrailbe Sept / Family branch, who had their territory at Glenconkeine in Loughinsholin in the south of Co. Tyrone in Central Ulster and later nearby in Co. Armagh and Co. Monaghan in Southern Ulster. They were also in Co. Antrim in the north - east of Ulster.  Kinsmen to the Cenel mBinnig Glenne, Cenel mBindigh Locha Droichid who had their territory to the east of Magh Ith in Co. Tyrone, Cenel mBindigh Tuaithe Rois who had their territory to the east of the River Foyle. See also Hamilton. Ancestors - *89.Echach "Binnich," *88.Eogan the 1st King of Aileach (Cenel nEogain), *89.Niall of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

Hamilton. Used by the O Hamills, which see, to anglicize their name.

Hamilton. Norman Scottish origins. (Descended initially from Walter Fitz Gilbert de Hameldone) who supported Robert the Bruce in the 14th Century AD. They arrived during the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill territories in the Ulster Province and the Foreign non - Catholic Plantations there in the reign of the Stuart English King, James 1st. They were English Viscounts in Limerick in Co. Limerick in the mid - north - west of the Munster Province. Manorhamilton is in Co. Leitrim in Northern Connacht.

Hamlin. They were in Co. Meath in the south - east of Northern Leinster from the 13th - 18th Century AD with Hamlinstown there and also nearby in Co. Louth in the north - east.

Hammond. Used for Cammon or Cammond, which see - Irish / Mheic Amoinn. A Sept / Family branch, who had their territory in Co. Down in the south - east of the Ulster Province. See also Mac Calmont.

Hammond. They were in Ireland before the Anglo - Norman Invasion in the 12th Century AD.