Sources

1) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Eleanor (de Bello Monte, or Beaumont, daughter of Henry, earl of Lancaster), countess of Arundel...Writ touching the lands &c. which she held in dower or otherwise for life of the inheritance of John son of Henry son and heir of John de Bello Monte, her late husband. 16 January, 46 Edward III...John de Bello Monte died in seisin of the premises, and on his death Henry his son and heir, being of full age, entered thereon and granted them with the king’s licence to Richard earl of Arundel and Eleanor his wife for her life, with reversion to himself and his heirs...She died on 12 January last."Dated: 1372 Evidence for Henry being the father of Eleanor and her marriage to the Lords of Arundel. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol13/pp214-226. Reference: C 135/232/9 (Data from direct source)
2) Source: The Mowbray Estate "MARRIAGE OF JOHN (II) WITH JOAN OF LANCASTER, 1338...Henry of Lancaster, earl of Derby, and John de Moubray, lord of the Isle of Axholme...Defeasance of bond from John to Henry of an annual rent of 8,000 marks due from his castle and manor of Gower, his castle and manor of Bramber (Sussex) and his manors of Thirsk (Yorks.), Epworth (Lincs.), Melton Mowbray (Leics.) and Haunes (Beds.)."Date: 1338. External Link
https://discovery.nationalarchives.gov.uk/details/r/090e8e83-8d2b-4b4f-b9c8-cbbe057ec495. Reference: BCM/D/1/1/3 (Data from direct source)
3) Source: Duchy of Lancaster: Royal Charters "Letters patent granting to Edmund of Lancaster the marriage of Maud daughter and heiress of Patrick de Chaworth for his son Henry."Dated: 1291. External Link
http://discovery.nationalarchives.gov.uk/details/r/C3540615. Reference: DL 10/182
4) Source: Chancery: Inquisitions Post Mortem, Series I, Edward II "Adam de la Forde...A moiety of the manor (extent given) held of Sir Henry de Lancastria by the courtesy of England of the inheritance of his wife, daughter and heir of Patrick de Chawortht, by service of 1/4 knight’s fee."Dated: 1325. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol6/pp412-418
5) Source: Chancery: Inquisitions Post Mortem, Series I, Edward I "William Talebot (Talbot)...Boreslegh. A messuage, 100a. land, 6a. brushwood, 16a. meadow, 11s. 2½d. rent of free tenants, a water-mill, &c. All the aforesaid held of Maud daughter and heir of Patrick de Cadurcis [alias Chaworth who is under age and in the king's wardship] by service of 1 knight's fee."Dated: 1287. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol2/pp377-383. Reference: C 133/47/1 (Data from secondary evidence)
6) Source: Chancery: Inquisitions Post Mortem, Series I, Edward I "Patrick de Cadurcis alias de Cadurciis, de Chadurciis, de Kadurcis de Chaworcis...Maud his daughter, aged 1 at the feast of the Purification last, is his next heir...Cheddworth. The manor, held of the earl of Warwick in chief, service unspecified. It was given to Isabel de Cadurcis, wife of the said Patrick, in free marriage"Dated: July 1283Dated: July 1283. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol2/pp284-295. Reference: C 133/35/4 (Data from direct source)
7) Source: Special Collections: Ancient Petitions "Petitioners: John de Mowbray and Joan de Mowbray, his wife.""Nature of request: John and Joan de Mowbray state that they have been sued in the common bench by Thomas de Breuse regarding the manors of Washington, Findon and West Grinstead, but the case has been pending for over six years without judgment. They ask that the king order the case to be summoned before the peers in parliament so that judgment may be reached.""People mentioned: John de Mowbray, father of the petitioner; Thomas [de Breuse (Braose), son of Peter de Breuse; Peter de Breuse (Braose).""[1348]". External Link
http://discovery.nationalarchives.gov.uk/details/r/C9294156. Reference: SC 8/167/8311 (Data from secondary evidence)
8) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Eleanor (de Bello Monte, or Beaumont, daughter of Henry, earl of Lancaster), countess of Arundel...Writ touching the lands &c. which she held in dower or otherwise for life of the inheritance of John son of Henry son and heir of John de Bello Monte, her late husband. 16 January, 46 Edward III...John de Bello Monte died in seisin of the premises, and on his death Henry his son and heir, being of full age, entered thereon and granted them with the king’s licence to Richard earl of Arundel and Eleanor his wife for her life, with reversion to himself and his heirs...She died on 12 January last."Dated: 1372. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol13/pp214-226. Reference: C 135/232/9 (Data from direct source)