Morgan John Winthrop O'Donovan
Morgan John Winthrop O'Donovan (1893–1969), The O'Donovan, MC, held the position of O'Donovan of Clan Cahill  from 1940 to his death in 1969. He was the son of Morgan William II O'Donovan and Mary Eleanor Barton, and was a descendant in the male line from Teige, brother of, and through a female line from, Donal II O'Donovan, The O'Donovan of Clancahill, whom was the last chief of his sept inaugurated in the ancient Gaelic manner, with the White Rod, by his father in law MacCarthy Reagh, Prince of Carbery, circa 1584.
O'Donovan attended Marlborough College, and then Royal Military Academy Sandhurst, being commissioned in 1913. He fought in the First World War, and in 1917 was decorated with the Military Cross. Between 1919 and 1920 he fought in the Iraq Campaign and was mentioned in despatches.
From 1937 to 1940 O'Donovan commanded the 1st Battalion, Royal Irish Fusiliers, fighting in the Second World War. In January 1942 he took command of 210th Independent Infantry Brigade (Home) as it was being converted into 38th (Irish) Infantry Brigade. He retired in 1944 with the rank of Brigadier. O'Donovan was then with the British Red Cross and Order of St. John in 1945.
Marriage and issue
Morgan John Winthrop married Cornelia Bagnell, daughter of William Henry Bagnell and Florence May Burrowes, and they had issue:
- Katharine Mary O'Donovan
- Morgan Gerald Daniel O'Donovan
- The equivalent style is Lord of Clancahill, which has fallen into disuse.
- Joslen, p. 373.
- Burke, Bernard, and Hugh Montgomery-Massingberd, Burke's Irish Family Records. London: Burke's Peerage Ltd. 5th edition, 1976.
- Butler, W. F. T., "The Barony of Carbery", in Journal of the Cork Historical and Archaeological Society, Volume X, Second Series. 1904. pp. 1–10, 73–84.
- Sir Richard Cox, 1st Baronet, Carberiae Notitia. 1686. extracts published in Journal of the Cork Historical and Archaeological Society, Volume XII, Second Series. 1906. pp. 142–9
- Curley, Walter J.P., Vanishing Kingdoms: The Irish Chiefs and their Families. Dublin: Lilliput Press. 2004.
- O'Donovan, John (ed. & tr.), Annala Rioghachta Eireann. Annals of the Kingdom of Ireland by the Four Masters, from the Earliest Period to the Year 1616. 7 vols. Dublin: Royal Irish Academy. 1848–51. 2nd edition, 1856. Volume VI, Appendix, Pedigree of O'Donovan, pp. 2430–83.
- Lt-Col H.F. Joslen, Orders of Battle, United Kingdom and Colonial Formations and Units in the Second World War, 1939–1945, London: HM Stationery Office, 1960/Uckfield: Naval & Military, 2003, ISBN 1843424746.
Morgan William II O'Donovan
Morgan Gerald Daniel O'Donovan