http://clanmaccarthysociety.org/Articles/TheLastKing2.html

Donal IX left no legitimate male heirs. There were, however, three main contenders for the title of MacCarthy Mór. These were Donal the Base Son; Florence MacCarthy Reagh who was married to Ellen (heiress to Donal IX); and Dermot MacDonogh MacCarthy, Lord of Duhallow. The last two did not belong to the royal derbhfine, or family of princes, from which the candidate for MacCarthy Mór was selected by tanistry, and had no valid claim to the title. For a time the title of MacCarthy Mór alternated between Donal the Base Son and Florence MacCarthy. However, the ancient Kingdom of Desmond had died with King Donal IX MacCarthy Mór.

Donal MacCarthy Mór: his son; b. 1518, d. 1596. This prince m. Honoria, the dau. of his brother-in-law, James, Earl of Desmond. He was, in 1565, created by Queen Elizabeth, Earl of Clancare (or Glencare), in the "Kingdom of Kerry," and Viscount of Valentia in the same county. Glencare or Clancare is a corrupted form of "Clan Carthy"—the English Court at that time being ignorant of the language or usages of the Irish. In 1568, this Donal was looked upon by his countrymen as "King of Munster." The "honours" heaped on him by the "virgin queen" expired with him, as he left no male legitimate issue. He left an illegitimate son, Donal, who proclaimed himself "The MacCarthy Mór," but did not succeed in his designs. His only legitimate child, the Princess Elana, married the celebrated Finghin MacCarthy. At A.D. 1596 the Four Masters say of this Donal:—

"MacCarthy Mór died, namely Donal, son of Donal, son of Cormac Ladhrach, son of Teige; and although he was called MacCarthy Mór, he had been honourably created earl (of Clancare in Cork), before that time, by command of the sovereign of England; he left no male heir after him, who would be appointed his successor; and only one daughter (Elana or Ellen), who became the wife of the son of MacCarthy Riabhach, namely Fingin or Florence, and all were of opinion that he was heir to that MacCarthy, who died, namely Donal.

Source: http://www.libraryireland.com/Pedigrees1/MacCarthyMor.php

• Reference: MyHeritage Family Trees - SmartCopy: Mar 9 2017, 1:45:20 UTC