Maelsechlainn Ó Cellaigh, king of Uí Maine, Chief of the Name, died in 1402.

Maelsechlainn was a son of the previous king, and continued the kingdom's expansion, and rise of prestige, that William Buidhe had initiated. The borders were expanded as land lost in the 13th century to the Earl of Ulster

Earl of Ulster

The title of Earl of Ulster has been created several times in the Peerage of Ireland and Peerage of the United Kingdom. Currently, the title is a subsidiary title of the Duke of Gloucester, and is used as a courtesy title by the Duke's son, Alexander Windsor, Earl of Ulster...

 was regained at the expense of the Burke of Clanricarde

Clanricarde

Clanricarde was a term meaning both a territory and a title in Ireland between the 13th and early 20th centuries.-Territory:The territory, in what is now County Galway, Ireland, stretched from the barony of County Clare in the north-west along the borders of County Mayo, to the River Shannon in the...

. At one stage, Ó Cellaigh's power extended to within a few miles of Loughrea

Loughrea

Loughrea is a town in County Galway, Ireland. The town lies north of a range of wooded hills, the Slieve Aughty Mountains.The town expanded in recent years as it increasingly becomes a commuter town for the city of Galway.- Name :...

, the caput

Caput

The Latin word caput, meaning literally "head" and by metonymy "top", has been borrowed in a variety of English words, including capital, captain, and decapitate...

 of the Clanricarde.

Further reading

• The Tribes and customs of Hy-Many, John O'Donovan
  John O'Donovan (scholar)
  John O'Donovan , from Atateemore, in the parish of Kilcolumb, County Kilkenny, and educated at Hunt's Academy, Waterford, was an Irish language scholar from Ireland.-Life:...
  
  , 1843
• The Parish of Ballinasloe, Fr. Jerome A. Fahey
  Jerome A. Fahey
  Father Jerome A. Fahey was an Irish priest and writer, 1843–1919.Fahey was born at Killomoran, Gort, and educated in the town's national school and St. Jarlath's, Tuam. He studied at Maynooth from 1860, been ordained there in 1867....
  
  .
• The Surnames of Ireland, Edward MacLysaght
  Edward MacLysaght
  Edward MacLysaght was one of the foremost genealogists of twentieth century Ireland. His numerous books on Irish surnames built upon the work of Patrick Woulfe's Irish Names and Surnames and made him well known to all those researching their family past.-Early life:Edward was born in Flax Bourton...
  
  , Dublin, 1978.
• A New History of Ireland - lists and genealogies, vol. 9, Oxford University Press, 1984.
• The Story of the Concannons, Maureen Concannon O'Brien, Clan Publications, Dublin, c.1995.
• "The Ó Ceallaigh Rulers of Uí Mhaine - A Genealogical Fragment, c. 1400 Part 1", Nollaig Ó Muraíle
  Nollaig Ó Muraíle
  Nollaig Ó Muraíle is an Irish scholar. He published an acclaimed edition of Dubhaltach Mac Fhirbhisigh's Leabhar na nGenealach in 2004. He was conferred with the honour of admittance to the Royal Irish Academy in 2009.-Life and career:...
  
  , Journal of the Galway Archaeological and Historical Society
  Galway Archaeological and Historical Society
  The Galway Archaeological and Historical Society was founded on the 21 March 1900, at the Railway Hotel, Galway. It promotes the study of the archaeology and history of the west of Ireland. Since 1900, the Society has published 60 volumes of the Journal of the Galway Archaeological and Historical...
  
  , vol. 60, 2008.
• Revised edition of McCarthy's synchronisms at Trinity College Dublin.