Mathghamhain mac Cian was a nobleman of the

Eóganacht Raithlind Eóganacht Raithlind or Uí Echach Muman are a branch of the Eóganachta, the ruling dynasty of Munster in southwest Ireland during the 5th-10th centuries. They took their name from Raithlinn or Raithleann described around the area of Bandon, in ...

and a grandson of

Brian Boru Brian Boru (; modern ; 23 April 1014) was the High King of Ireland from 1002 to 1014. He ended the domination of the High King of Ireland, High Kingship of Ireland by the Uí Néill, and is likely responsible for ending Vikings, Viking invasio ...

, one of the

High Kings of Ireland High King of Ireland ( ) was a royal title in Gaelic Ireland held by those who had, or who are claimed to have had, lordship over all of Ireland. The title was held by historical kings and was later sometimes assigned anachronously or to leg ...

. He was the son of

Cian mac Máelmuaid Cían mac Máelmuaid was a son of Máel Muad mac Brain, who was twice King of Munster. Cían's father had been killed by Brian Boru at the Battle of Belach Lechta. He was a member of Uí Echach Muman or Eóganacht Raithlind, and an "ancestor of t ...

and his wife Sadhbh, daughter of Brian Boru. The ''

Leabhar Oiris Leabhar Oiris () is a Gaelic- Irish manuscript and chronicle. ''An Leabhar Oiris'' was created by one, or more, author or authors, who drew on material in the Irish annals relating to the years 976 to 1028. It is believed to have been written in ...

'' records Mathghamhain fighting at the

Battle of Clontarf The Battle of Clontarf () took place on 23 April 1014 at Clontarf, near Dublin, on the east coast of Ireland. It pitted an army led by Brian Boru, High King of Ireland, against a Norse- Irish alliance comprising the forces of Sigtrygg Silkbea ...

for the High King and committing a familial revenge killing. He died at the Battle of Clontarf, in 1014. Mathghamhain's descendants eventually became sovereigns over territory in west

Cork "Cork" or "CORK" may refer to: Materials * Cork (material), an impermeable buoyant plant product ** Stopper (plug), or "cork", a cylindrical or conical object used to seal a container *** Wine cork an item to seal or reseal wine Places Ireland * ...

, notably around the

Iveragh Peninsula The Iveragh Peninsula () is located in County Kerry in Republic of Ireland, Ireland. It is the largest peninsula in southwestern Ireland. A mountain range, the MacGillycuddy's Reeks, lies in the centre of the peninsula. Carrauntoohil, its hig ...

and the town of Bandon. Today, his descendants use the surname

O'Mahony O'Mahony (Old Irish: ''Ó Mathghamhna''; Modern Irish: ''Ó Mathúna'') is the original name of the clan, with breakaway clans also spelled O'Mahoney, or simply Mahony, Mahaney and Mahoney, without the prefix. Brodceann O'Mahony was the eldest of t ...

, O'Mahoney,

Mahoney Mahoney is an Irish surname originally designating the descendants of Mathghamhain. https://books.google.com/books?id=FJoDDAAAQBAJ&pg=RA2-PA16&dq=mahoney+name%C2%A0Mathghamhain&hl=en&newbks=1&newbks_redir=0&source=gb_mobile_search&sa=X&ved=2ahUKEwi ...

Mahony Mahony may refer to : Artists and entertainers * Bertha Mahony (1882–1969), children’s literature publisher * Dennis Mahony (1821–1879), Irish-American journalist and politician * Eoghan Mahony, American television writer and producer * Fra ...

, Maughon or Mahaney, Irish Ó Mathghamhna or modernised Ó Mathúna.

References

1014 deaths Military personnel killed in action Year of birth unknown {{Ireland-bio-stub