What evidence do we have that Joanna (wife of Sir John Colpeper de Brenchesle) was the daughter of John I "Lackland", King of England?
She's my direct gr grandmother - so I'd be pleased if there was any, but I'm rather doubtful.
Medlands (http://fmg.ac/Projects/MedLands/ENGLAND,%20Kings%201066-1603.htm)
has two Joans as daughters of John - but neither married a Culpepper:
1. a legitimate daughter JOAN by ISABELLE d’Angoulême, : JOAN of England (22 Jul 1210-Havering-atte-Bower, Essex 4 Mar 1238, bur Tarrant Crawford Abbey, Dorset[595]). The Annals of Worcester record the birth “die Sanctæ Mariæ Magdalenæ” in 1210 of “regi filia Johanna”[596]. King John confirmed the proposed marriage of "Johannam filiam suam genitam de Ysabell uxore sua, filia com Engolism" to "Hugonis de Lysuinan fil H com Marchie" by charter dated 29 Sep 1214[597]. Matthew Paris records her marriage, specifying that she was the sister of King Henry III[598]. The Annals of Dunstable record that “regi Scotiæ” married “rege…sororem suam” in 1221, specifying that she was eleven years old at the time and had previously been betrothed to “Hugoni Brun”[599]. The marriage contract between “Alexando...Regi Scotiæ” and “Rex...Johannam primogenitam sororem nostram” is dated 15 Jun 1220[600]. The Annales Londonienses record the death in 1238 of "Johanna regina regis Scotiæ, soror regis Anglorum" while on a visit to her brother in England and her burial "IV Non Mar"[601]. The Annals of Tewkesbury record the death “apud Haveringes III Non Mar” of “regina Scotiæ soror regis Angliæ” and her burial “apud Tarentune monialium”[602]. Betrothed (29 Sep 1214) to HUGUES [XI] de Lusignan Comte de la Marche, son of HUGUES [X] "le Brun" Sire de Lusignan, Comte de la Marche & his first wife --- (-1249 after 15 Jan, bur Abbaye de Valence). He succeeded in 1220 as Comte d'Angoulême. m (contract 15 Jun 1220, York Minster 18 or 25 Jun 1221) as his first wife, ALEXANDER II King of Scotland, son of WILLIAM I “the Lion” King of Scotland & his wife Ermengarde de Beaumont (Haddington, East Lothian 24 Aug 1198-Isle of Kerrara, Bay of Oban 6 Jul 1249, bur Melrose Abbey, Roxburghshire).
2. King John had one illegitimate daughter by Mistress (2): JOAN (-30 Mar 1237). King John confirmed "castrum de Ellesmara" to "Lewelino principi Norwallie in maritagium cum Johanna filia nostra" by charter dated 16 Apr 1205[642]. Her husband sent her to make peace with the king her father in 1211 when the latter was attacking North Wales. She was legitimated in 1226: Pope Honorius III gave dispensation to “Joan wife of Leuwelin prince of North Wales, daughter of king John declaring her legitimate, but without prejudice to the king or realm of England”, dated 29 Apr 1226[643]. She and her son David did homage to King Henry III in 1229[644]. The Chronicle of the Princes of Wales records that "William Bruse was hanged by Llywelyn son of Iorewerth, having been caught in the chamber of the prince with the princess Jannet, daughter of King John and wife of the prince" in 1230[645]. The Annales Cambriæ record the death in 1237 of "domina Johanna filia regis Angliæ et uxor Lewilini principis Walliæ" and her burial "apud Haber"[646]. The Annals of Tewkesbury record the death “III Kal Apr” in 1236 of “domina Johanna Walliæ, uxor Lewelini, filia regis Johannis et reginæ Clemenciæ”[647]. The Chronicle of the Princes of Wales records that "Dame Joan daughter of king John and the wife of Llywelyn son of Iorwerth" died in Feb 1237 "at the court of Aber and was buried in a new cemetery on the side of the strand which Howel bishop of Llanelwy had consecrated"[648]. m (1205) as his second wife, LLYWELLYN ap Iorwerth Fawr ("the Great") Prince of North Wales, son of IORWERTH Drwyndwyn ("flat nose") Prince of Gwynedd & his wife Marared of Powys ([1173]-1240).