Sources

1) Source: Chancery: Inquisitions Post Mortem, Series I, Edward I "Walter Heron...Silkeston. The manor held by the said Walter and Alice his wife...Walter son of William Heron had no lands or tenements in the county; he had a daughter named Emelina, now aged 7 1/2, who is his next heir in blood; she is likewise next heir of William father of the said Walter, who held the manor of Haddeston of the king in chief, and died at Newcastle upon Tyne on Sunday before the feast of St. Thomas last. The said Walter died long before the said William. Mary late the wife of the said William is dowered by the king’s command of a third part of the aforesaid manor. Neither of the said Walter or William his father has any other heir than the same Emelina whilst she lives: her marriage, as the jury believe, is worth 30l. to sell."Dated: 1296. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol3/pp255-265. Reference: C 133/78/19 (Data from secondary evidence)
2) Source: Chancery: Inquisitions Post Mortem, Series I, Edward I "William Heyrun, alias Heyron...Emelina, daughter of Walter Heyron, aged 6, is his next heir, and it is believed that she is with Lady Emelina de Hastings in Norfolk at her manor called Gissing."Dated: Dec 1297. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol3/pp255-265. Reference: C 133/78/18 (Data from secondary evidence)
3) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Philip Darcy, knight...He died on 24 April last. John Darcy, aged 22 years and more, is his son and heir...He held in his demesne as of fee, to him and the heirs male of his body, the under-mentioned manors of Templehirste and Templenewsom by gift of Edward III to John Darcy, knight, grandfather of the said Philip, and the heirs male of his body, with reversion to the king... by virtue of a gift made to John Darcy, father of the said Philip, and Elizabeth his wife"Dated: 28 April 1399. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol17/pp402-417. Reference: C 136/102/14 (Data from direct source)
4) Source: Chancery: Inquisitions Post Mortem, Series I, Henry V "Darcy, Philip, kt, son of John, Lord Darcy: Middx, Northumb, Yorks, Derb, Notts, Lincs, Calais""Philip Darcy died on 2 Aug. 1418. Elizabeth, aged 2 1/2 years and more, and Margery, aged 1 1/2 years and more, are his daughters and next heirs. John Darcy is his brother and heir male, aged 14 years and more.""The annuity was granted by Edward [III], the king's great-grandfather, to John Darcy , great-grandfather of Philip Darcy, knight , whose heir Philip was, i.e. son and heir of John, formerly Lord Darcy , son and heir of Philip Darcy , brother and heir of John Darcy , son and heir of John Darcy the son, and came into the hand of ‪ Henry IV . Margaret, widow of John, formerly Lord Darcy , holds 1/3 in dower by assignment of ‪Henry IV , with reversion to Philip Darcy, knight , son and heir of John, Lord Darcy , and his heirs, and 2/3 are in the king's hand for the reasons mentioned above."Dated: 1419-1420. External Link
http://discovery.nationalarchives.gov.uk/details/r/C6523664. Reference: C 138/43/78. King's College London, 2014. | Mapping the Medieval Countryside [online]. Available at http://www.inquisitionspostmortem.ac.uk/view/inquisition/21-353/354 (Data from direct source)
5) Source: Chancery: Inquisitions Post Mortem, Series I, Henry IV "John Darcy, knight... Elizabeth, his father’s widow...John Darcy his grandfather and Elizabeth his wife...After the deaths of John and Elizabeth they descended to Philip their son, and so to John his son...that they should enfeoff Philip son of John and Eleanor, Philip’s wife, daughter of Henry Lord Fitzhugh...He died on 9 Dec. last. Philip his son and heir is aged 14 years and more...Jointly with Margaret his wife, by the grant of Philip Lord Darcy and Meinill to them and the heirs male of their bodies, he held the manor of Sturton le Steeple of Joan Lady Beauchamp by knight service, annual value £8"Dated: 1411. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol19/pp339-362. Reference: C 137/87/36 (Data from direct source)
6) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "John Darcy of Knayth (Knaith) or John Darcy, knight...Inq. taken at Ekynton, Saturday after St. Edward the King, 30 Edward III...He died at Notton on Saturday after St. Cedde last. John his son, aged 5 years at the Nativity of St. John the Baptist last, is his heir...to him and Elizabeth his wife"Dated: 1356. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol10/pp245-259. Reference: C 135/133/31 (Data from direct source)