Elizabeth O’Callaghan1
Her married name became Colthurst.1 From April 1778, her married name became Longfield.1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
Robert Longfield1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
- [S47] BIFR1976 page 734. See link for full details for this source. Hereinafter cited as. [S47]
William Colthurst1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
Cornelius O’Callaghan, 1st Viscount Lismore1 
by John Ferneley, 1809 2
Cornelius O’Callaghan, 1st Viscount Lismore was born on 2 October 1775.1 He was the son of Cornelius O’Callaghan, 1st Baron Lismore of Shanbally and Frances Ponsonby.1 He married Lady Eleanor Butler, daughter of John Butler, 17th Earl of Ormonde and Lady Frances Susan Elizabeth Wandesford, on 11 August 1808.1 He and Lady Eleanor Butler were divorced in 1826.1 He died on 30 May 1857 at age 81.1
He succeeded as the 2nd Baron Lismore of Shanbally, co. Tipperary [I., 1785] on 12 July 1797.1 He was created 1st Viscount Lismore, of Shanbally, co. Tipperary [Ireland] on 30 May 1806.1 He was appointed Privy Counsellor (P.C.) [Ireland] in 1835.1 He was created 1st Baron Lismore of Shanbally Castle, co. Tipperary [U.K.] on 6 July 1838.1 He held the office of Lord-Lieutenant of County Tipperary between 1851 and 1857.1
Children of Cornelius O’Callaghan, 1st Viscount Lismore and Lady Eleanor Butler
- Captain Hon. William Frederick O’Callaghan1 d. 1836
- Lady Anne Maria Louisa O’Callaghan+1 d. 6 Jul 1867
- Hon. Cornelius O’Callaghan1 b. 1809, d. 16 Aug 1849
- George Ponsonby O’Callaghan, 2nd Viscount Lismore+1 b. 16 Mar 1815, d. 29 Oct 1898
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
- [S3409] Caroline Maubois, “re: Penancoet Family,” e-mail message to BENR, 2 December 2008. Hereinafter cited as “re: Penancoet Family.”
Lt.-Gen. Hon. Sir Robert William O’Callaghan1 
He was appointed Knight Commander, Order of the Bath (K.C.B.)1 He was Colonel of the 39th Foot.1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
Hon. George O’Callaghan1 
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
Hon. Elizabeth O’Callaghan1 
Her married name became Hyde.1
Child of Hon. Elizabeth O’Callaghan and John Hyde
- Sarah Hyde+2 d. 12 Aug 1850
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
- [S47] BIFR1976 page 618. See link for full details for this source. Hereinafter cited as. [S47]
John Hyde1 
He held the office of Deputy Lieutenant (D.L.)3 He lived at Castle Hyde, County Cork, IrelandG.1
Child of John Hyde and Hon. Elizabeth O’Callaghan
- Sarah Hyde+4 d. 12 Aug 1850
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
- [S47] BIFR1976 page 618. See link for full details for this source. Hereinafter cited as. [S47]
- [S37] BP2003 volume 3, page 3433. See link for full details for this source. Hereinafter cited as. [S37]
- [S47] BIFR1976. [S47]
Hon. Mary O’Callaghan1
From 1849, her married name became Scott.1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
Reverend Thomas Scott1
He lived at Barmeen, County Dublin, IrelandG.1 He graduated with a Master of Arts (M.A.)1
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 180. Hereinafter cited as The New Extinct Peerage.
