Lady Anne Cowper1 
From 1731, her married name became Colleton.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 87. Hereinafter cited as The New Extinct Peerage.
James Edward Colleton1 
He lived at Haynes Hill, Berkshire, EnglandG.1 He held the office of Member of Parliament (M.P.) for Lostwithiel between 1747 and 1768.2 He held the office of Member of Parliament (M.P.) for St. Mawes between 1772 and 1774.2
- [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 87. Hereinafter cited as The New Extinct Peerage.
- [S6289] The History of Parliament Online, online http://www.historyofparliamentonline.org. Hereinafter cited as History of Parliament.
Hon. Edward Spencer Cowper1 
He held the office of Member of Parliament (M.P.)1 He lived at Digswell, Hertfordshire, EnglandG.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 87. Hereinafter cited as The New Extinct Peerage.
- [S35] BLG1965 volume 1, page 198. See link for full details for this source. Hereinafter cited as. [S35]
Catherine March Phillipps1 
From 23 May 1808, her married name became Cowper.1 From 29 January 1827, her married name became Hamilton.2
- [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 87. Hereinafter cited as The New Extinct Peerage.
- [S35] BLG1965 volume 1, page 198. See link for full details for this source. Hereinafter cited as. [S35]
Hon. Henry Frederick Cowper1 
He held the office of Member of Parliament (M.P.) for Hertfordshire between 1865 and 1885.1 He held the office of Justice of the Peace (J.P.)2 He held the office of Deputy Lieutenant (D.L.)2
- [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 87. Hereinafter cited as The New Extinct Peerage.
- [S37] BP2003 volume 2, page 2427. See link for full details for this source. Hereinafter cited as. [S37]
Lady Henrietta Emily Mary Cowper1 
- [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 87. Hereinafter cited as The New Extinct Peerage.
Lady Katrine Cecilia Compton1 
After her marriage, Lady Katrine Cecilia Compton was styled as Countess Cowper on 25 October 1870. From 25 October 1870, her married name became Cowper.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 88. Hereinafter cited as The New Extinct Peerage.
- [S7529] WikiTree, online http://www.wikitree.com/. Hereinafter cited as WikiTree.
- [S37] BP2003 volume 2, page 2928. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
John Crew1 
He lived at Nantwich, Cheshire, EnglandG.1
Children of John Crew and Alice Mainwaring
- Sir Thomas Crew1
- Sir Randolph Crewe+1 b. 1558, d. 1646
- [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 88. Hereinafter cited as The New Extinct Peerage.
Alice Mainwaring1
Her married name became Crew.1
Children of Alice Mainwaring and John Crew
- Sir Thomas Crew1
- Sir Randolph Crewe+1 b. 1558, d. 1646
- [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 88. Hereinafter cited as The New Extinct Peerage.
Humphrey Mainwaring1
Child of Humphrey Mainwaring
- [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 88. Hereinafter cited as The New Extinct Peerage.
