Sir Maurice Dylon1 
- [S37] BP2003 volume 1, page 1147. See link for full details for this source. Hereinafter cited as. [S37]
Letitia Tuite1
Her married name became Dylon.1
- [S37] BP2003 volume 1, page 1147. See link for full details for this source. Hereinafter cited as. [S37]
unknown MacCostello, Baron of Costello1
Child of unknown MacCostello, Baron of Costello
Margaret MacCostello1
Her married name became Dillon.
Children of Margaret MacCostello and Captain Garrett Dillon
James Dillon1
He lived at Carrownegarry, County Roscommon, IrelandG.1
Sir Edward Tuite1
Child of Sir Edward Tuite
- Eleanora Tuite+2 d. 8 Apr 1638
Eleanora Tuite1 
Her married name became Dillon. After her marriage, Eleanora Tuite was styled as Viscountess Dillon of Costello-Gallin on 16 March 1621/22.
Children of Eleanora Tuite and Theobald Dillon, 1st Viscount Dillon of Costello-Gallin
- Sir Christopher Dillon+2 d. 28 Feb 1623/24
- Sir Lucas Dillon+2
- William Dillon2
- Jane Dillon+
- Thomas Dillon+2 b. 1592
Sir Christopher Dillon1 
He lived at Ballylagham, County Mayo, IrelandG.1
Children of Sir Christopher Dillon and Lady Jane Dillon
- Theobald Dillon+2
- Lucas Dillon, 2nd Viscount Dillon of Costello-Gallin+2 b. Mar 1610, d. 13 Apr 1629
- Thomas Dillon, 4th Viscount Dillon of Costello-Gallin+2 b. Mar 1615, d. 1673/74
James Dillon, 1st Earl of Roscommon1 
He gained the title of 1st Earl of Roscommon.4
Child of James Dillon, 1st Earl of Roscommon
Children of James Dillon, 1st Earl of Roscommon and Elinor Barnewall
- [S37] BP2003 volume 1, page 1147. See link for full details for this source. Hereinafter cited as. [S37]
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume XI, page 124. Hereinafter cited as The Complete Peerage.
- [S22] Sir Bernard Burke, C.B. LL.D., A Genealogical History of the Dormant, Abeyant, Forfeited, and Extinct Peerages of the British Empire, new edition (1883; reprint, Baltimore, Maryland: Genealogical Publishing Company, 1978), page 172. Hereinafter cited as Burkes Extinct Peerage.
- [S37] BP2003. [S37]
- [S6] Cokayne, and others, The Complete Peerage, volume XI, page 125.
- [S1916] Tim Boyle, “re: Boyle Family,” e-mail message to BENR, 16 September 2006. Hereinafter cited as “re: Boyle Family.”
Lady Jane Dillon1
Children of Lady Jane Dillon and Sir Christopher Dillon
- Theobald Dillon+2
- Lucas Dillon, 2nd Viscount Dillon of Costello-Gallin+2 b. Mar 1610, d. 13 Apr 1629
- Thomas Dillon, 4th Viscount Dillon of Costello-Gallin+2 b. Mar 1615, d. 1673/74
