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 117^th 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

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 117^th 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)

I estimate that today there are around 30,000 people with a variation of the name.

Ireland

United States

Great Britain

Austrailia

Canada

Probably a lot more!

The database is a work in progress:

https://docs.google.com/spreadsheets/d/1xSt0TqzPBhlqMi2hf50ynFsMVjTiUJd4owDjBO4jO38/edit#gid=0

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:

www.familytreedna.com/groups/hoolihan

Website:

https://houlihan.one-name.net/

Facebook Page:

https://www.facebook.com/OhUallachainGenealogy/

Facebook Groups:

https://www.facebook.com/groups/162869344130628/

https://www.facebook.com/groups/1435140383271932/

Family Tree DNA project page:

https://www.familytreedna.com/groups/hoolihan

Database:

https://docs.google.com/spreadsheets/d/1xSt0TqzPBhlqMi2hf50ynFsMVjTiUJd4owDjBO4jO38/edit#gid=0