MacCarthy (Mac Carthaigh), Domhnall (d. 1531), lord of Carbery, was eldest son of Finghín MacCarthy (qv), lord of Cairbre, and (probably) Katherine, daughter of Thomas fitz James FitzGerald (qv), 8th earl of Desmond. On Finghín's death (1505) he was succeeded by his brother Diarmaid, who reigned only a short while, dying in the following year. This paved the way for Domhnall's accession to the lordship. Once secure in his position, Domhnall proved himself to be a loyal adherent of the FitzGerald cause. In 1510 he rendered military service to Gerald fitz Maurice FitzGerald (qv), 8th earl of Kildare and lord deputy of Ireland, during his bruising campaign against Toirdhealbhach Donn O'Brien (qv). Three years later Domhnall allied himself to Sir Piers Butler (qv) (d. 1539), but the terms of the pact reveal his FitzGerald inclinations through his acknowledgement of Kildare as his overlord. His marriage to Kildare's daughter Eleanor further cemented these bonds, and in a curious gesture he gave his new wife a veto over all appointments within Carbery (Cairbre). It seems that Domhnall's flirtation with Butler was motivated by hostility towards the earls of Desmond. However, this did not prevent his playing active roles in the civil wars that beset the Desmond earldom in 1516. Four years later, when Thomas Howard (qv), earl of Surrey, lord deputy of Ireland, visited Munster, Domhnall was prominent among the bevy of nobility who hurried to make their submissions. Little more is known of Domhnall, except that he was captured after raiding MacCarthy Mór country in 1524. This astute and generally successful dynast died at an unknown date in 1531, leaving four able sons.
AFM, v, 1289, 1307, 1337, 1375, 1403; ALC, ii, 249, 275; Ann. Conn., 655, 677; AU, iii, 157, 179, 205, 555; NHI, ii, 629, 664; ix, 157