Guild of One-Name Studies
One-name studies, Genealogy
Variants: Holahan, Holihan, Holohan, Hoolihan, Hulahan, O hUallachain, Oulahan, Wholihan
Category: 1 - A study where research using core genealogical datasets and transcriptions is in its early stages.
DNA website: www.familytreedna.com/public/hoolihan
Contact: Mark Wholihan
The surname Houlihan has hundreds of variant spellings and crossovers with other surnames.
Our Surname began around 1100 A.D. with a man named Uallacháin. He was the descendant of a High King of Ireland. The Kings name was Cairbre Lifechair. He was the 117th monarch of Ireland. Son of King Cormac Mac Art.
Descendants of Uallacháin were Ó hUallacháin and they were chieftains of Ui Maine (Hy-Many) over Clan Colgan alongside the Ó Maddens in Kings County (County Offaly)
The name was changed dramatically when it was anglicized from the original Irish language and is often just recorded phonetically.
I estimate that today there are around 30,000 people with a variation of the name.
Colaghan, Coolacan, Coolaghan, FitzMerry, Halahan, Halegan, Hallahan, Halligan, Hallihan, Haulahan, Haulihan, Hohalan, Holaghan, Holahan, Holahane, Holahen, Holaman, Holehan, Holhane, Holhgane, Holian, Holigan, Holighan, Holihan, Holihane, Hollaghan, Hollahan, Hollahin, Holligan, Hollihan, Hollihane, Hollogan, Holloghan, Hollohan, Hologhan, Hologhane, Hologhon, Holohan, Holohane, Holohian, Holoughan, Hooahan, Hoolaghan, Hoolaghane, Hoolahan, Hoolehan, Hoolhan, Hooligan, Hooligans, Hoolihan, Hoolihen, Hoologhan, Hoolohan, Hoolohane, Houghihan, Houhlan, Houilihan, Houlaghan, Houlaghane, Houlahan, Houlahane, Houlahen, Houlahin, Houlaman, Houlan, Houlehan, Houlehen, Houlehin, Houlhan, Houligan, Houlighan, Houlihan, Houlihane, Houlihen, Houlihin, Houliihan, Houllahan, Houllahin, Houllihan, Houllihane, Houlohan, Houly, Howlan, Howlegan, Howlihan, hUallachain, Hulahan, Hulahen, Hulegan, Hulihan, Hullahan, Hulligan, Hullihan, Hulohan, Huoalhane, Huolaghane, Huolahan, Huolahen, Huolehan, Huolihan, Huolihin, Huollahan, Huollahin, Huollahon, Huologhan, Huolohan, Huolohane, Mac Conlaghan, MacMerry, Merrie, O hUallachain, O'Coulaghan, O'Hoolaghan, O'Houlihan, O'Huallachain, Olehan, Oulaghan, Oulahan, Oulihan, Oullaghan, Oullahan, Proud, Proude, Soople, Suple, Supple, Uallachain, Vain, Vane, Welihan, Whelton, Wholahan, Wholeham, Wholehan, Wholehane, Wholheen, Wholiham, Wholihan, Wholihane, Wholohan, Wholohane, Whoolahan, Whoolihan, Whoolihane, Whoulihan, Wilton, Woholain, Woholohan, Wolahan, Wolohan, Woolahan, Wooloughan, Woulaghan, Woulahan
Probably a lot more!
The database is a work in progress:
The Hoolihan Surname DNA group at Family Tree DNA is growing and accepts all the types of DNA and third party transfers.
The link to the FTDNA website for the Hoolihan DNA project:
Family Tree DNA project page:
World Families Hoolihan DNA project page:
You may find our other Guild websites of interest: