Mac Hosty - Irish / Mheic Coiste. A Sept / Family branch, who had their territory in Co. Clare in the north - west of Thomond / Tuaisceart Mhumhain / Northern Munster who anglicized as Mac Custy.

Hosty / Hodge / Rodger. Welsh origins. Gaelicized as Mheic Oiste. They were in Co. Mayo in the mid - west of the Connacht Province in the 13th Century AD.

O Houghegan - Irish / Ua hEochagain. A Sept / Family branch, who had their territory in the west of the Connacht Province. Many changed to O Hogan and O Geoghegan. See also - O Haughian.

Houghton. See - Haughton. Gaelicized as de Hochtun.

O Hounihan or O Hoonahan - Irish / Ua hUamhnachain - uamhnach / terrible. A Sept / Family branch, who had their territory in Co. Limerick in the mid - north - west of Thomond / Tuaisceart Mhumhain / Northern Munster and nearby in the north of Co. Cork in Desmond / Des Mhumhain / Southern Munster.

O Hourahan - Irish / Ua Arrachain. In reality O Hanrahan - Irish / Ua hAndrahain, which see, used in the north of Co. Tipperary in the north - east of the Munster Province.

O Hourican - Irish / Ua hAnnrachain. A Sept / Family branch, who had their territory in Co. Longford in the north - west of Northern Leinster. Used as a synonym there also for Somers, which see, in the Granard region. Also may have been used for O Hourigan in the Munster Province.

O Hourigan - Irish / Ua hOdhragain. An Ithian Corca Loigde Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster. Ancestors - *36.Lewy / Lughaidh, *35.Ith.

O Hourihan or O Hourihane - Irish / Ua hAnradhain - anradh / warrior. An important Erenagh Sept / Family branch, who had their territory at Ross in the west of Co. Cork in Desmond / Des Mhumhain / Southern Munster .See also O Hanrahan and O Hourahan.

O Houriskey or O Horiskey - Irish / Ua hUaruisce actually O Horish / Ua hUarghuis, which see. Anglicized also as Water, which see. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Sept / Family branch. Especially see - O Horish

Houston. Scottish origins. They were in the Ulster Province. Also used as a synonym for Mac Quiston there, which see, and Mac Taghlin, which see, in Co. Donegal in the north - west of the Ulster Province. See also Mac Cutcheon.

Hovenden. Originally de Offington or Ovington. They were in Co. Tyrone in Central Ulster under the O Neills near the end of the 16^th Century AD and where by then "More Irish then the Irish." During the Confiscation of the 3,500,000 acres and the Foreign non - Catholic Plantations of the territory of the Heremonian Ui Cobhthaigh Dal Cuinn  Septs there they were classed as "Native." Prior to this Hovendons who were Catholic had been Planted into Co. Laois in the mid - north - west of Southern Leinster, possibly by Queen Mary, but they lost the lands there during the Oliver Cromwell Invasion and Confiscations. They are now not confined to Ulster Province.

Howard. Used to anglicize their name by the O Hures, which see - Irish / Ui hIomhair. A Sept / Family branch, who had their territory in Co. Clare in the north - west of Thomond / Tuaisceart Mhumhan / Northern Munster.

O Howley. A Sept / Family branch, who had their territory in Co. Clare in the north - west of Thomond / Tuaisceart Mhumhain / Northern Munster where they were Chiefs. They were also in Co. Sligo in the north - west of the Connacht Province.

Howlett / Huileid - Anglo Norman origins. They were in Co. Wexford in the south - east of Southern Leinster.

O Howley - Irish / Ua hUallaigh - uallach / proud. A Sept / Family branch, who had their territory in Co. Clare in the north - west of Thomond / Tuaisceart Mhumhain / Northern Munster and nearby in the Connacht Province. See also - O Wholey.

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

O Hoyne - Irish / Ua hEoghain. A Sept / Family branch, who had their territory in Co. Kilkenny in the south - west of Southern Leinster. Anglicized elsewhere as Owens, which see.