Joan
Cornwall
Born about in Cornwall, England
Ancestors 
Daughter of Richard (Plantagenet) of England
and Joan (Unknown) de Valletort
Sister of
Isabel Plantagenet [half], Henry Plantagenet [half], Edmund Plantagenet [half], Richard (Plantagenet) of Cornwall, Walter Cornwall, Lawrence Cornwall, Philip DeSancto Austolo and Philip Cornwall [half]
Wife of
Richard (Champernon) Champernoun
— married
[date unknown] [location unknown]
Descendants 
Mother of
Hugh De Todesford, Richard Champernon, Margaret Champernon and Oliver (Champernoun) Champernon
Died before
before about age 61
in East Winch, Norfolk, England
Profile managers:
Kenneth Shelton 
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[send private message] and Darlene Athey-Hill [send private message]Profile last modified
| Created 9 Mar 2016
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Biography
Joan Cornwall is a member of the House of Plantagenet.
There is an extended discussion by medieval researchers of the ambiguous evidence supporting Joan's presumed ancestry here.
"Joan, wife of Richard Champernowne of Modbury, is considered to be the illegitimate daughter of Richard, earl of Cornwall. This is known from a single source: The well-known Devonshire antiquarian William Pole writing in the 17th century said he has seen a document where Edmund, earl of Cornwall, called Joan Champernowne his sister. For this to be true she would have to be an illegitimate daughter of his father. His father was known to have had several illegitimate children, including by Joan (Unknown, Valletorte) Okeston ( aka Oxton). Since we also know that Joan’s son was a nephew of James de Oxton, it all makes perfect sense that Joan, wife of Richard Champernowne was a daughter of Richard, earl of Cornwall by his known mistress Joan Valletorte."[1]
Per wikipedia:
By his mistress Joan de Valletort, Richard [Earl of Cornwall] had five children... Joan was the daughter of Sir Walter de Bath, Knight and Sheriff of Devon in 1217, and the sister of Henry de Bath. Inquisition And Post Mortem of Devon; Thirteenth-Sixteenth Centuries Court of Chancery states: Walter de Bath held land in Clauton of the gift of Guy Norant of land in Fernhull, held of Joan who was wife of Ralph de Valletorta, who has it in dower. History of St. Mary’s Abbey of Buckfast in the county of Devon: A.D. 760–1906, p. 7.
Joan first married Ralph de Valletort who was living in 1246 and dead by 1267; they were the parents of Reginald de Valletort, Inq. p.m. 1270. Reginald granted Trematon to Earl Richard. Joan later married Alexander Okeston and they were the parents of Sir James Okeston. Children of Richard, Earl of Cornwall and Joan [included] Joan of Cornwall, who received a grant from her half-brother Edmund in which she was called sister, she married firstly, Richard de Champernoun, by whom she had a son, Sir Richard, and secondly, Sir Peter de Fissacre, by whom she had no issue.
Sources
- ↑ Brief summary of the known evidence by Joe Cochoit on this G2G thread.
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- Profile of Joan (Cornwall) married Richard Champernon Aug 26, 2017.
- another EuroAristo line Nov 16, 2016.
Rejected matches › Joan (Plantagenet) de Clare (1272-1307) › Dionysia (English) de Champernon (abt.1230-1284) › Joan (Unknown) Champernon (abt.1254-aft.1309) › Joan (Champernoun) Courtenay (aft.1360-1419) › Joan (Ferrers) Champernon (abt.1365-aft.1420) › Joan (Cornwall) Howard (abt.1285-1341)
Featured National Park champion connections: Joan is 20 degrees from Theodore Roosevelt, 25 degrees from Stephanus Johannes Paulus Kruger, 20 degrees from George Catlin, 21 degrees from Marjory Douglas, 29 degrees from Sueko Embrey, 20 degrees from George Grinnell, 25 degrees from Anton Kröller, 20 degrees from Stephen Mather, 24 degrees from Kara McKean, 22 degrees from John Muir, 18 degrees from Victoria Hanover and 30 degrees from Charles Young on our single family tree. Login to find your connection.
Categories: House of Plantagenet
201. Alexander de Oxeton alias de Okeston. Writ of certiorari, on the complaint of Joan late the wife of the said Alexander, that the escheator had taken into the king's hand the manors of Modbiri and Brideford, a third part of Brigesham, and lands &c. in Hirberton, of which she was enfeoffed jointly with the said Alexander, 4 March, 4 Edw. I. Devon. Inq. Wednesday after St. Gregory, 4 Edw. I. Modbyri manor, Brideford manor, a third part of Brixham manor, and certain lands &c. in Hurberton worth 40s. yearly, were held jointly by the said Alexander de Okeston and Joan, who were enfeoffed to them and their heirs for ever by Roger de Valletorta, to hold of him and his heirs, excepting that they should hold the manor of Modbyri of the earl of Cornwall by reason of the barony of Tremeton, rendering 6d., to him yearly, and from Brideford 6d., from Brixham 6d., and from Huberton 6d. and 1 grain of pepper, for all service to the said Roger and his heirs. These lands used to be held of the king in barony, but now are held in socage only and by a mesne as abovesaid, to the king's decrease by the alienation. It is therefore in the discretion of the king and his council whether he will restore the lands &c. to the said Joan, for the jury do not consider any other injury to be done to the king or others than as abovesaid.
Also, their son Richard's spouse is not listed. His son Richard is the one who married Joan, daughter of Ralph de Valletort. Is seems as if this Wiki ancestry is missing a generation.