O Holian - Irish / Ua hOileain. A Sept / Family branch, who had their territory in Co. Galway in Southern Connacht where some also changed to Holland. May also have been used as a variant for Hyland.

Holland. English toponymic. Used in Co. Limerick in the mid - north - west of the Munster Province as an abbreviated form for Mulholland, which see. Used also in Co. Clare in the north - west of Munster as a synonym for O Holohan, which see. See also Holian. John Holland the inventor of the submarine was born at Liscannor in Co. Clare.

O Hollegane or O Holligan - Irish / Ui hAllagain. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Airthir Ui Echdach Ui Echach Orior Siol Ciarain Ua nEchach Clann Ruadhagain Sept / Family branch, who had their original territory in the north of Co. Armagh in the south - east of the Ulster Province and nearby in Co. Down and eventually had their territory in the Connacht Province who were in reality a branch of the O Halligans, which see, who used these names as variants. Especially see - O Hallahan.

O Holleran. Used as a variant for O Halloran, which see, in Co. Galway and Co. Mayo in the south - west of the Connacht Province.

O Holligan. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Airthir Ui Echdach Ui Echach Orior Siol Ciarain Ua nEchach Clann Ruadhagain Sept / Family branch, who had their original territory in the north of Co. Armagh in the south - east of the Ulster Province and nearby in Co. Down. See also - O Hollegane. Especially see - O Hallahan.

Hollingsworth. English toponymic origins. They were in the Connacht Province in the Mid - 17^th Century AD and were later in Co. Wexford in the south - east of Southern Leinster.

Holly.Used by an Irish Sept / Family branch of the Mheic Cuilinn / holly, who had their territory in Co. Kerry in Iar Mhumhain in the south - west of the Munster Province.

Holly. Used as a synonym for Mac Quillan, which see, in the Ulster Province.

Holmes. Scottish origins. They were especially in the Ulster Province and were also in other Provinces.

Holmes. Used as a synonym in the north of the Connacht Province for Cavish, which see, and vice versa.

O Holohan - Irish / Ui hUallachain. A Sept / Family branch from the Clann Colgan who had their territory in Co. Offaly in the north - west of Southern Leinster who were kinsmen to the O Hennessys. Also see - O Hoolahan.

Holt (a wood). English origins. They were in Ireland in 1295 AD and in Co. Cork in Southern Munster in the 14^th Century AD and later in the Ulster Province. Joseph Holt was one of the leaders of the United Irishmen in 1798 AD who was transported to Australia to become by default involved in the Battle for Vinegar Hill there.

Holywood  or Hollywood -

Homan / Howman / Hugh’s man. They were in Co. Westmeath in the south - west of Northern Leinster in 17^th Century AD and were later mainly in Co. Cork in Southern Munster.

O Honan - Irish / Ui hEoghanain. A Sept / Family branch, who had their territory at Iniscathy and later in Co. Limerick in the mid - north - west of Thomond / Tuaisceart Mhumhain / Northern Munster. Used also in other areas of Co. Clare as a variant for O Honeen, which see.

Hone. Dutch origins. They came directly from Holland.

O Hone. May have also been used as a form of O Howen - Irish / Ui hEoghain. A Sept / Family branch, who had their territory in Co. Fermanagh and Co. Monaghan in the south - west of Southern Ulster.

O Honeen - Irish / Ui hUainin - uaine / green. Originally O Huonyn. A Sept / Family branch, who had their territory in Co. Clare in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster. O Honan and Greene were used as variants.

O Hood or Mac Hood or Mahood - Irish / Ui hUid. A Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Bardic Sept / Family branch, who had their territory in Co. Antrim in the north - east of the Ulster Province where they were bards to the Ui Niaill. Ancestor - *87.Niall of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

O Hood or Mac Hood  or O Houd or O Hude or O Mahood or Ohoud  - Irish / Ua hUid, A Heremonian Ui Cobhthaigh Dal Cuinn Colla Uais Ui Mheic Uais Ui Tuitre Sept / Family branch, who had their territory in the west of Loch Neagh in Co. Tyrone in Central Ulster and north - west of the loch at Loughinsholin in Co. Derry. Kinsmen to O Flynn / O Lynn / Ua Fhloinn. O Donnellan / O Donelan, O Furphy / O Furfie / O Furphey / O Furvey / Ua Foirbhithe, O Mulrooney / O Mulroney / O Murrony / Ua Mael Ruanaidh.  Ancestors - *101.Floind (Ui Loind), *100.Murray / Muiredach, *99.Indrechtach, *98.Reachtabrat, *97.Mailcraibhi, *96.Maoilfothartaigh, *95.Sweeney / Suibhne,- *94.Furadhran, *93.Becc, *92.Cuanach, *91.Dairi, *90.Felim / Feidlimid, *89.Fechin, *88.Fiachrach, *87.Tuirtri, *86.Eochy / Eachach, *85.Carroll / Carioll "Colla "Uais" the 121st King of Tara / Ireland, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland,

O Hoogley - Irish / Ui Maoil Ghuala. An Irian Conmaicne Rein Muinter Eolais Tellach Cearbhallan Sept / Family branch, who had their territory at Mohill and Leitrim in Co. Leitrim in Northern Connacht. Especially see - O Mulhooly.

O Hoolaghan. A Sept / Family branch, who had their territory in Co. Galway in the south - west of the Connacht Province where they were Chiefs and were also nearby in Co. Co. Offaly in the north - west of Southern Leinster and Co. Cork in Southern Munster.

O Hoolahan or O Houlihan or O Oulihan or O Whoolahan. (17 variants) Irish / Ui hUallachain - uallach / proud. A Sept / Family branch, who had their territory in Co. Clare in the north - west of Thomond / Tuaisceart Mhumhain / Northern Munster. O Houlihan used in Munster. O Nolan used as a synonym in the north of the Connacht Province.

O Hoolahan or O Holohan or O Oulihan or O Whoolahan (17 variants) Irish / Ui hUallachain - uallach / proud. A Sept / Family branch - who had their territory in Co. Offaly in the north - west of Southern Leinster. Holohan used in Co. Kilkenny in the south - west of Southern Leinster. Also see Merry.