When you have someone of this kind (Dukes, Duchesses. Earls, Knights....) in your tree then the books Burke’s Peerage, Baronetage and Knightage and Dictionary of National Biography are good places to start. They are expensive but you will quite often find a copy in the reference section of your local main library. Burke's Peerage have a searchable website at this address where you can do a free search but you have to subscribe to view the pages found.
There is another site which is totally free though which may help and that is http://www.thepeerage.com/ The site is not linked at all to Burke's Peerage but this website is
the result of around fourteen years of work by one (somewhat
eccentric) person collecting information on the European royal
families and on the British Peerage, and then entering it into a range
of various genealogy programs
The front page of the wbsite does point out that this site is very much still a work in progress, and is bound to have a more than a few errors. You need to pay attention to any citations given when evaluating the quality and accuracy of this data.
For example, a search for Richard Wydeville comes up with
Richard
Wydevill, 1st Earl Rivers
M, #102911, b. circa 1405, d. 12 August
1469
Richard Wydevill, 1st Earl Rivers was born circa 1405.2 He was the son of Richard Wydevill and Joan Bedlisgate. He
married Jacquetta
de Luxembourg,
daughter of Pierre
I de Luxembourg, Comte de St. Pol,
Brienne et Conservan and Margherita del Balzo, between 16 September 1435 and 23 March
1436.2 He died on 12 August 1469 executed.2
He was
also known as Richard Woodville.3
He gained the title of 1st Earl Rivers in 1466.
Children of Richard Wydevill, 1st Earl Rivers and Jacquetta de Luxembourg
- Sir Edward Woodville2 d. 1488
- Richard Woodville, 3rd Earl
Rivers2 d. 1491
- Thomas Woodville4
- John Woodville4
- Lewis Woodville4
- Eleanor Woodville4
- Martha Woodville4
- Elizabeth Wydevill+ b. c 1437, d. 8 Jun
1492
- Lady Anne Woodville+5 b. c 1438, d. 30 Jul 1489
- Margaret Woodville+2 b. c 1439, d. b 6 Mar 1490/91
- Anthony Woodville, 2nd Earl
Rivers+2 b. bt 1440 - 1442, d. 26 Jun 1483
- Katherine
Woodville+6 b. c 1442, d. b 1513
- Mary Wydeville+2 b. c 1443, d. b 1481
- Sir John Woodville7 b. c 1445, d. 12 Aug 1469
- Jacquetta Woodville+2 b. 1444/45, d. 1509
- Lionel Woodville2
b. c 1446, d. 1484
Citations
- [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
XII/2, page 910. Hereinafter cited as The Complete
Peerage.
- [S11]
Alison Weir, Britain's Royal Families: The Complete Genealogy
(London, U.K.: The Bodley Head, 1999), page 124. Hereinafter cited as
Britain's Royal Families.
- [S11] Alison Weir, Britain's Royal
Families, page 138.
- [S11] Alison Weir, Britain's Royal
Families, page 125.
- [S11] Alison Weir, Britain's Royal
Families, page 111.
- [S11] Alison Weir, Britain's Royal
Families, page 105.
- [S11] Alison Weir, Britain's Royal
Families, page 108.
Each name in this record is clickable taking you that individual, many with pictures of them, and this searching comes up with more sources of information through the citations.
Where there is a + next to a child, that means they had children themselves.