^This family tree is based on a pedigree of the viscounts of Clare,[1] as well as genealogies of the viscounts of Clare[2][3] and the Earls of Thomond.[4][5] Also see the list of children in the text.
^ abCokayne 1913, p. 252, line 10. "Connor (O'Brien) Viscount Clare, &c. [I. [Ireland] ], 2nd but 1st surv. s. [surviving son] and h. [heir], b. [born] about 1605."
^Cokayne 1896, p. 391, note b. "They were descended from the celebrated Brien Boroihme, principal king of Ireland (1002–1004) through his grandson Turlogh ..."
^Ó Siochrú 2009, 1st paragraph, 4th sentence. "O'Brien married Catherine, widow of Maurice, Viscount Roche of Fermoy, and third daughter of Gerald Fitzgerald ..."
^Burke 1883, p. 406, right column, bottom. "... with 6 daus, Margaret, m. to Hugh O'Reilly; Ellen, m. to Sir Roger Shagnessy; Hornora, m. to John Fitzgerald, Esq., of Castleishen, and 2ndly to John Macnamafra, Esq.; Sarah, m. to Daniel Sullivan Bear; Mary m. _ Power of Doonil ..."
^Cokayne 1913, p. 252, line 1. "At the age of 80 or upwards he [Daniel] was cr. [created] 11 July 1662, Baron Morarta and Viscount Clare [or O'Brien of Clare], co Clare [I. [Ireland] ]."
^Ohlmeyer 2004, p. 358. "O'Brien, Daniel, first viscount Clare (1577?–1663)"
^ abcÓ Siochrú 2009, 3rd paragraph, 3rd sentence. "He died in 1666 and was succeeded by his eldest surviving son Conor, and then in 1670 by Daniel, his grandson."
^Warner 1768, p. 6. "... the twenty-third October [1641] ... seized all the towns, castles, and houses belonging to the Protestants which they had force enough to possess;"
^Firth 1894, p. 322, line 4. "... his son together with Daniel Obryan were delivered to me [Edmund Ludlow] as hostages ..."
^Ó Siochrú 2009, End of 2nd paragraph. "... he submitted to the English parliament under the articles agreed the following year by Donogh MacCarthy, Viscount Muskerry. O'Brien was one of the hostages ..."