# Cormac Laidir Oge MacCarthy, 10th Lord of Muskerry

Cormac Oge Laidir MacCarthy, 10th Lord of Muskerry (1447–1536) was an Irish chieftain, styled Lord of Muskerry. In 1520 he defeated James FitzGerald, 10th Earl of Desmond in the battle of Mourne Abbey.

## Birth and origins

Family tree :
| | | | | | | Cormac 2nd Lord d. 1374 | Cormac 2nd Lord d. 1374 | Cormac 2nd Lord d. 1374 | Cormac 2nd Lord d. 1374 | Cormac 2nd Lord d. 1374 | Cormac 2nd Lord d. 1374 |
| Teige 6th Lord 1380–1448 | Teige 6th Lord 1380–1448 | Teige 6th Lord 1380–1448 | Teige 6th Lord 1380–1448 | Teige 6th Lord 1380–1448 | Teige 6th Lord 1380–1448 | | | Owen 7th Lord | Owen 7th Lord | Owen 7th Lord | Owen 7th Lord | Owen 7th Lord | Owen 7th Lord | | | Cormac 8th Lord | Cormac 8th Lord | Cormac 8th Lord | Cormac 8th Lord | Cormac 8th Lord | Cormac 8th Lord |
| | | Cormac Laidir 9th Lord 1411–1494 | Cormac Laidir 9th Lord 1411–1494 | Cormac Laidir 9th Lord 1411–1494 | Cormac Laidir 9th Lord 1411–1494 | Cormac Laidir 9th Lord 1411–1494 | Cormac Laidir 9th Lord 1411–1494 | | | Mary Fitzmaurice | Mary Fitzmaurice | Mary Fitzmaurice | Mary Fitzmaurice | Mary Fitzmaurice | Mary Fitzmaurice | | | Owen MacCarthy d. 1498 | Owen MacCarthy d. 1498 | Owen MacCarthy d. 1498 | Owen MacCarthy d. 1498 | Owen MacCarthy d. 1498 | Owen MacCarthy d. 1498 |
| | | | | Cormac Oge Laidir 10th Lord 1447–1536 | Cormac Oge Laidir 10th Lord 1447–1536 | Cormac Oge Laidir 10th Lord 1447–1536 | Cormac Oge Laidir 10th Lord 1447–1536 | Cormac Oge Laidir 10th Lord 1447–1536 | Cormac Oge Laidir 10th Lord 1447–1536 | | | Catherine Barry | Catherine Barry | Catherine Barry | Catherine Barry | Catherine Barry | Catherine Barry | | |
| | | Teige 11th Lord 1472–1565 | Teige 11th Lord 1472–1565 | Teige 11th Lord 1472–1565 | Teige 11th Lord 1472–1565 | Teige 11th Lord 1472–1565 | | | Callaghan 12th Lord | Callaghan 12th Lord | Callaghan 12th Lord | Callaghan 12th Lord | Callaghan 12th Lord | | | Mary d. 1548 | Mary d. 1548 | Mary d. 1548 | Mary d. 1548 | Mary d. 1548 | | | James 12th Earl d. 1540 Court Page | James 12th Earl d. 1540 Court Page | James 12th Earl d. 1540 Court Page | James 12th Earl d. 1540 Court Page | James 12th Earl d. 1540 Court Page |
| Dermot 13th Lord 1501–1570 | Dermot 13th Lord 1501–1570 | Dermot 13th Lord 1501–1570 | Dermot 13th Lord 1501–1570 | Dermot 13th Lord 1501–1570 | Dermot 13th Lord 1501–1570 | | | Ellen FitzGerald | Ellen FitzGerald | Ellen FitzGerald | Ellen FitzGerald | Ellen FitzGerald | Ellen FitzGerald | | | Cormac 14th Lord d. 1583 tanist | Cormac 14th Lord d. 1583 tanist | Cormac 14th Lord d. 1583 tanist | Cormac 14th Lord d. 1583 tanist | Cormac 14th Lord d. 1583 tanist | Cormac 14th Lord d. 1583 tanist | | | Callaghan 15th Lord tanist resigned 1584 | Callaghan 15th Lord tanist resigned 1584 | Callaghan 15th Lord tanist resigned 1584 | Callaghan 15th Lord tanist resigned 1584 | Callaghan 15th Lord tanist resigned 1584 | Callaghan 15th Lord tanist resigned 1584 |
| | | | | | | | | | | | | Cormac MacDermot 16th Lord 1552–1616 | Cormac MacDermot 16th Lord 1552–1616 | Cormac MacDermot 16th Lord 1552–1616 | Cormac MacDermot 16th Lord 1552–1616 | Cormac MacDermot 16th Lord 1552–1616 | Cormac MacDermot 16th Lord 1552–1616 |
| XXX | XXX | XXX | XXX | XXX | XXX | Subject of the article | Subject of the article | Subject of the article | Subject of the article | Subject of the article | Subject of the article | XXX | XXX | XXX | XXX | XXX | XXX | Lords & Viscounts Muskerry & Earls of Clancarty | Lords & Viscounts Muskerry & Earls of Clancarty | Lords & Viscounts Muskerry & Earls of Clancarty | Lords & Viscounts Muskerry & Earls of Clancarty | Lords & Viscounts Muskerry & Earls of Clancarty | Lords & Viscounts Muskerry & Earls of Clancarty | XXX | XXX | XXX | XXX | XXX | XXX | Earls of Desmond | Earls of Desmond | Earls of Desmond | Earls of Desmond | Earls of Desmond | Earls of Desmond |
Cormac was born in 1447, most likely at Kilcrea Castle, residence of his parents. He was the son of Cormac Laidir MacCarthy and his wife Mary Fitzmaurice. His father was the 9th Lord of Muskerry. His father's family were the MacCarthys of Muskerry, a Gaelic Irish dynasty that had branched from the MacCarthy-Mor line in the 14th century when a younger son received Muskerry as appanage.
His mother was a daughter of Edmund Fitzmaurice, 8th Baron of Kerry, also called Baron Lixnaw instead of Baron Kerry.

## Marriage and children

MacCarthy married Catherine, daughter of John Barry, 1st Viscount Buttevant.
Cormac and Catherine had five sons:
* Teige (1472–1565), his successor
* Diarmaid
* Eoghan
* Callaghan (Ceallachan)
* Cormac
—and two daughters:
* Mary, married James FitzGerald, de jure 12th Earl of Desmond, called "Court Page"
* Julia, married three times. First Gerald Fitzmaurice, 15th Baron Kerry (died 1550), secondly Cormac na Haoine MacCarthy Reagh (1490–1567), and thirdly Edmund Butler, 1st/11th Baron Dunboyne (died 1566)

## 10th Lord of Muskerry

MacCarthy's father was killed in 1495 by his brother Owen, MacCarthy's uncle, who usurped the lordship. In 1498 MacCarthy, with help from Thomas FitzThomas FitzGerald, future 11th Earl of Desmond, killed Owen. The succession was however denied to him by Cormac, another uncle, for three more years until he succeeded in deposing Cormac in 1501 and eventually acceded as 10th Lord of Muskerry. These two uncles are not counted as lords of Muskerry.

## Battle of Mourne

In September 1520 Muskerry and Donal MacCarthy Reagh helped Thomas FitzGerald, 11th Earl of Desmond, defeat James FitzMaurice FitzGerald, 10th Earl of Desmond in the battle of Mourne. Donal MacCarthy Reagh had married Muskerry's sister Ellen.
In December, together with Piers Butler, 8th Earl of Ormond, they besieged James FitzMaurice FitzGerald, in Dungarvan.

## Death

Muskerry died in 1536 at Kilcrea Castle and was buried in the friary.