Lt.-Col. Sir James Cockburn of that Ilk, 3rd Bt.1 
He succeeded as the 3rd Baronet Cockburn [N.S., 1671] circa January 1751.1 On 15 December 1757 he sold Langton and the office of Usher.1 He gained the rank of Lieutenant-Colonel in 1760 in the 48th Foot at Quebec.1
Child of Lt.-Col. Sir James Cockburn of that Ilk, 3rd Bt. and Mary Rochead
Children of Lt.-Col. Sir James Cockburn of that Ilk, 3rd Bt. and Phoebe Sharman
Robert Rochead of Masterton1
Child of Robert Rochead of Masterton
- Mary Rochead+2 d. 5 Sep 1766
Mary Rochead1 
From 8 April 1764, her married name became Cockburn.1
Child of Mary Rochead and Lt.-Col. Sir James Cockburn of that Ilk, 3rd Bt.
Lt.-Col. Sir Williams James Cockburn of that Ilk, 4th Bt.1 
He gained the rank of Lieutenant-Colonel in the 1st Foot.1 He succeeded as the 4th Baronet Cockburn [N.S., 1671] on 13 March 1780.1
Oliver Plunkett Gregan1
Child of Oliver Plunkett Gregan
Phoebe Sharman1
From after 1766, her married name became Cockburn.1
Children of Phoebe Sharman and Lt.-Col. Sir James Cockburn of that Ilk, 3rd Bt.
- [S37] BP2003 volume 1, page 843. See link for full details for this source. Hereinafter cited as. [S37]
John Cockburn1 
He was a surgeon at County Kilkenny, IrelandG.1
Children of John Cockburn and Martha Rich
- Venerable William Cockburn+2 b. 1721, d. 7 Jun 1776
- Sir James Cockburn of that Ilk, 5th Bt.+2 b. 1723
Martha Rich1 
She lived at County Kilkenny, IrelandG.1 From 1720, her married name became Cockburn.1
Children of Martha Rich and John Cockburn
- Venerable William Cockburn+2 b. 1721, d. 7 Jun 1776
- Sir James Cockburn of that Ilk, 5th Bt.+2 b. 1723
Venerable William Cockburn1 
He held the office of Archdeacon of Ossory in 1762.1 He graduated with a Doctor of Law (LL.D.)1
Children of Venerable William Cockburn and Susanna Savage
Susanna Savage1
From 10 December 1763, her married name became Cockburn.1
Children of Susanna Savage and Venerable William Cockburn
- [S37] BP2003 volume 1, page 843. See link for full details for this source. Hereinafter cited as. [S37]