Editing Richard of Cornwall (section)

===Illegitimate children===
Richard had several documented out-of-wedlock children. One of Richard's mistresses was Joan de Vautort, widow of Ralph de Vautort<ref name="Pole, p.309">{{harvnb|Pole|1791|p=309}}</ref> (d. 1267), [[feudal baronies in Devonshire|feudal baron of Harberton]], Devon{{sfn|Pole|1791|p=21}} and [[feudal barony of Trematon|Trematon]], Cornwall. Joan later married Sir Alexander Okeston, [[lord of the manor]] of [[Modbury]] in Devon, a part of the Vautorts' [[feudal baron]]y of Harberton that had been granted him by Roger de Vautort.<ref name="Pole, p.309"/> Joan bore Alexander a son and heir, Sir James Okeston.<ref name="Vivian 1531, p.160">[[John Lambrick Vivian|Vivian, Lt.Col. J.L.]], (Ed.) ''The Visitations of the County of Devon: Comprising the Heralds' Visitations of 1531, 1564 & 1620'', Exeter, 1895, p. 160, pedigree of Champernowne</ref>

By Joan de Vautort or other mistresses, the Earl of Cornwall had at least three sons and a daughter as follows:<ref>{{Harvnb|Richardson|2011a|pp=573–574}}. An additional daughter, Isabel, who received a grant from King Henry III in which she was called "niece", has been attributed to Earl Richard. However, Cecil G. Savile, ''The House of Cornwall'', pp. 37–40, shows this to be chronologically impossible, and suggests that this Isabel was Henry's niece only in the half-blood, being granddaughter of the second marriage of his mother [[Isabella of Angoulême]] with [[Hugh X of Lusignan]].</ref>
* Philip of Cornwall, a priest.
* Sir Richard of Cornwall, who received a grant from his half-brother [[Edmund, 2nd Earl of Cornwall]] (d. 1300), in which he was called "brother". He married Joan, allegedly daughter of [[John Fitzalan (1246–1272)|John Fitzalan III]], and by her had three sons and a daughter. He was slain by an arrow at the [[Sack of Berwick (1296)|Siege of Berwick]] in 1296. His daughter Joan of Cornwall married Sir John Howard, from whom the [[Howard family]], [[Duke of Norfolk|Dukes of Norfolk]], are descended.<ref>{{Harvnb|Richardson|2011a|pp=574–575}}; {{Harvnb|Richardson|2011b|p=265}}</ref>
* Sir Walter of Cornwall, who received a grant of the royal manor of [[St Stephen-in-Brannel|Brannel]], Cornwall,<ref>Pridham, T.L., Devonshire Celebrities, (regarding the ancestry of the Cornwall family of Brannell), pp 12–17</ref> from his half-brother Edmund, 2nd Earl of Cornwall, in which he was called "brother". He was ancestor of the Cornwalls of Branell.
* Joan of Cornwall, daughter of Joan de Vautort, in 1283 received a grant from her half-brother Edmund, 2nd Earl of Cornwall, in which she was called "sister".{{sfn|Pole|1791|p=309}}{{sfn|Risdon|1811|p=187}} The younger Joan married (1st) Richard de Champernoun and (2nd) Sir Peter de Fishacre of [[Combe Fishacre]] and [[Coleton Fishacre]], Devon,{{sfn|Pole|1791|p=274}} having no issue by the second. Her childless half-brother Sir James Okeston made her son (or grandson) Richard de Champernoun his heir.{{sfn|Pole|1791|p=309}}{{sfn|Risdon|1811|p=187}}