Richard's wife Maud was also descended from two Sureties, Lacy and Quincy, so their sons Gilbert and Thomas and daughter Rose inherited four Magna Carta descents and passed them on as a group to large numbers of descendants, including a majority of Colonial Gateways.
Many early descendants married the descendants of other Sureties, especially those of Hugh le Bigod's daughter Isabel.
Later descendants married each other, so that their further descendants inherited the same cluster of ancestors multiple times.
In April 1248. Richard de Clare, earl of Gloucester, Thomas de Bello Campo, Walter de Scoteny, Roger de Clifford, William de Clare and Nicholas de Leuekenor, received a letter of protection with clause rolumus, until a fortnight after Midsummer, to go on a pilgrimage beyond seas.
(from Royal Ancestry) On the Monday following (his death), his body was taken to the Cathedral Church of Christ at Canterbury, where his entrails was buried before the altar of St. Edward the Confessor; the body was forthwith taken to the Collegiate Church of Tonbridge, Kent, where his heart was buried; and thence the body was finally borne to Tewkesbury, Gloucestershire, and buried there in the choir at Tewkesbury Abbey at his father's right hand 28 July 1262.
There is no such daughter as "Maud" born to Richard de Clare (and no documentation for such child). The profile seems to be a confusion with his daughter Margaret, as Maud was sometimes used for Margaret. There is no such location in Suffolk as "Tonebridge". De Tonebridge was a title of the Earls of Clare going back to Richard de Clare's great-great-great-grandfather and namesake, Richard de Clare. There is a "Tonbridge" also spelled "Tunbridge" in county Kent, where Richard de Clare owned a castle and other property. Maud de Clare needs to be merged into Margaret de Clare, with all facts to default to the ones on the profile of Margaret. See Richardson's Royal Ancestry Vol II, page 192 for details.
Richardson in Royal Ancestry Vol II page 192 states that it was rumored that Richard's death was from poison at the table of Peter of Savoy, the Queen's uncle. He died on 15, 16 or 22 Jul 1262 at Canterbury, Kent, England. He was about 40 years old.
↑ 2.02.1Royal Ancestry by Douglas Richardson Vol. II, page 192
Royal Ancestry by Douglas Richardson Vol. IV. page 587
Royal Ancestry 2013 D. Richardson Vol. II p. 192-195
Magna Carta Ancestry 2011 2nd ed. Vol. I p. 460-466
The complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, Cokayne, George Edward, (Gloucester [England] : Alan Sutton Pub. Ltd., 1987), 942 D22cok., vol. 3 p. 433.
Magna Carta Ancestry: A study in Colonial and Medieval Families, Richardson, Douglas, (Kimball G. Everingham, editor. 2nd edition, 2011), vol. 1 p. 451.
Weis, Frederick Lewis, The Magna Charta Sureties, 1215, 3rd edition, Genealogical Publishing Co., Inc., Baltimore, MD, 1979
Royal Ancestors, Michel L. Call
Royal Database, Camelot International, (Burke's old records)
It may be possible to confirm family relationships with Richard by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
Kenneth - I see you recently adopted this profile. I'm working on the shown parents and I don't see a "Robert" or a "Richard" in any of the sources. This profile is also unsourced, without issue or spouse. Please let me know if you have anything, otherwise please disconnect from parents.