Diana Helena Tomkinson1 
From 11 October 1969, her married name became Lewthwaite.
Children of Diana Helena Tomkinson and Sir David Rainald Lewthwaite, 5th Bt.
- Emma Victoria Lewthwaite2 b. 26 Nov 1971
- Mary-Claire Lewthwaite+2 b. 11 Dec 1972
Emma Victoria Lewthwaite1
Mary-Claire Lewthwaite1
Children of Mary-Claire Lewthwaite and Tim Tweedy
- Charlie William Tweedy3 b. 16 Sep 2002
- Ben Felix Tweedy3 b. 18 Jun 2004
- Petra Rose Tweedy3 b. 21 Sep 2005
- [S37] BP2003 volume 2, page 2320. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S1122] Peerage News, online http://peeragenews.blogspot.co.nz/. Hereinafter cited as Peerage News.
James Lewthwaite1 
He lived at Whicham, Cumberland, England.1
Child of James Lewthwaite and Elizabeth (?)
Elizabeth (?)1
Child of Elizabeth (?) and James Lewthwaite
Thomas Lewthwaite1
He lived at The Groopes, Whicham, Millon, Cumberland, England.1
Child of Thomas Lewthwaite and unknown Newby
- Thomas Lewthwaite+2 b. 8 Dec 1588, d. 12 Feb 1667
unknown Newby1
She lived at Haverigg, Cumberland, England.1 Her married name became Lewthwaite.
Child of unknown Newby and Thomas Lewthwaite
- Thomas Lewthwaite+2 b. 8 Dec 1588, d. 12 Feb 1667
Thomas Lewthwaite1 
He was a yeoman.1 He purchased Broadgate in 1642.1
Children of Thomas Lewthwaite and Frances Askew
- John Lewthwaite2 d. 1642
- James Lewthwaite+2 d. c 26 Mar 1677
- Margaret Lewthwaite2
- unknown daughter Lewthwaite2
- Agnes Lewthwaite2
Hugh Askew1
Child of Hugh Askew
- Frances Askew+2 d. c 22 Mar 1670
Frances Askew1 
From before 1619, her married name became Toto.1 From November 1619, her married name became Lewthwaite.
Children of Frances Askew and Thomas Lewthwaite
- John Lewthwaite2 d. 1642
- James Lewthwaite+2 d. c 26 Mar 1677
- Margaret Lewthwaite2
- unknown daughter Lewthwaite2
- Agnes Lewthwaite2
