Sean Dubh Mac Coisdealbhaigh,

Lord Lord is an appellation for a person or deity who has authority, control, or power over others, acting as a master, chief, or ruler. The appellation can also denote certain persons who hold a title of the peerage in the United Kingdom, or are ...

of Sliabh Lugha and Chief of the Name, died 1487. Under the year 1487, the

Annals of Lough Cé Annals ( la, annāles, from , "year") are a concise historical record in which events are arranged chronologically, year by year, although the term is also used loosely for any historical record. Scope The nature of the distinction between ann ...

state that "Mac Goisdelbh, i.e. John, died." The

Annals of the Four Masters The ''Annals of the Kingdom of Ireland'' ( ga, Annála Ríoghachta Éireann) or the ''Annals of the Four Masters'' (''Annála na gCeithre Máistrí'') are chronicles of Middle Ages, medieval Irish history. The entries span from the Flood myt ...

however give a more detailed account, stating that "John Duv Mac Costello, Lord of Sliabh-Lugha, died; and two lords were set up in his place, namely, William, the son of Edmond of the Plain, his own brother, and Jordan, the son of Philip Mac Costello."

External links

* http://www.ucc.ie/celt/published/T100005D/ Irish lords 15th-century Irish people People from County Mayo 1487 deaths Medieval Gaels from Ireland Year of birth unknown {{Ireland-bio-stub