W. L. Sargant1
Child of W. L. Sargant
- [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 155. Hereinafter cited as The New Extinct Peerage.
Balthazar Stephen Sargant Foster, 2nd Baron Ilkeston1 
He was admitted to Inner Temple in 1892 entitled to practise as a Barrister-at-Law.1 He was Stipendiary Magistrate of Birmingham in 1910.1 He succeeded as the 2nd Baron Ilkeston, of Ilkeston, co. Derby [U.K., 1910] on 31 January 1913.1 On his death, his title became extinct.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 155. Hereinafter cited as The New Extinct Peerage.
Mildred Charlotte Cobb1
From 20 December 1901, her married name became Foster.1 After her marriage, Mildred Charlotte Cobb was styled as Baroness Ilkeston on 31 January 1913.
- [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 155. Hereinafter cited as The New Extinct Peerage.
Henry Peyton Cobb1
Child of Henry Peyton Cobb
- [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 155. Hereinafter cited as The New Extinct Peerage.
Henry Illingworth1 
He held the office of Justice of the Peace (J.P.)2 He lived at Ladye Royde Hall, Bradford, Yorkshire, EnglandG.1
Children of Henry Illingworth and Mary Holden
- Marion Illingworth1 d. 17 May 1929
- Harry Holden Illingworth+1 b. 14 Oct 1862, d. 7 Feb 1925
- Albert Holden Illingworth, 1st and last Baron Illingworth1 b. 25 May 1865, d. 23 Jan 1942
- Rt. Hon. Sir Percy Holden Illingworth+1 b. 19 Mar 1869, d. 3 Jan 1915
- Mary Gertrude Illingworth+1 b. 1871, d. 1952
- [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 155. Hereinafter cited as The New Extinct Peerage.
- [S37] BP2003 volume 2, page 1939. See link for full details for this source. Hereinafter cited as. [S37]
Daniel Illingworth1 
He lived at Bradford, Yorkshire, EnglandG.2
Child of Daniel Illingworth
- Margaret Illingworth+2 d. 24 Apr 1913
Children of Daniel Illingworth and Elizabeth Hill
- Alfred Illingworth+3 d. 1907
- Henry Illingworth+1 b. 6 Nov 1829, d. 23 Sep 1895
- [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 155. Hereinafter cited as The New Extinct Peerage.
- [S21] L. G. Pine, The New Extinct Peerage, page 148.
- [S37] BP2003 volume 2, page 1939. See link for full details for this source. Hereinafter cited as. [S37]
Phineas Illingworth1 
He lived at Bradford, Yorkshire, EnglandG.1
Child of Phineas Illingworth and Betty Booth
- Daniel Illingworth+1 b. 12 Dec 1792, d. 18 Jun 1854
- [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 155. Hereinafter cited as The New Extinct Peerage.
William Illingworth1 
He lived at Moorhouse, Allerton, Yorkshire, EnglandG.1
Child of William Illingworth and Martha Wilinson
- Phineas Illingworth+1 b. 17 Sep 1763, d. 28 Jul 1837
- [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 155. Hereinafter cited as The New Extinct Peerage.
Jonas Illingworth1 
He lived at Allerton, Yorkshire, EnglandG.1
Child of Jonas Illingworth
- William Illingworth+1 b. 1744
- [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 155. Hereinafter cited as The New Extinct Peerage.
Jonathan Illingworth1 
He lived at Allerton, Yorkshire, EnglandG.1
Child of Jonathan Illingworth
- Jonas Illingworth+1 b. 1720
- [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 155. Hereinafter cited as The New Extinct Peerage.
