Sources

1) 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 Elizabeth, his wife, was father of John Darcy's children.. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol10/pp245-259. Reference: C 135/133/31 (Data from secondary evidence)
2) 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)
3) 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)
4) 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)
5) 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)
6) Source: Chancery: Inquisitions Post Mortem, Series II, and other Inquisitions, Henry VII to Charles I "Richard Strangways...the King gave to John Darcy ‘le fitz’ an annuity...It descended to Elizabeth wife of James Strangways, knt., mother of the said Richard...as daughters and co-heirs of Philip, son and heir of John, son and heir of Philip, brother and heir of the said John Darcy."Dated: 1487. External Link
https://www.british-history.ac.uk/inquis-post-mortem/series2-vol1/pp171-190. Reference: C 142/4/11 (Data from direct source)
7) Source: Chancery: Inquisitions Post Mortem, Series I, Henry IV "Elizabeth, widow of Philip Darcy, son and heir of John Darcy...She died on 11 Aug. Philip son of John her son is next heir, aged 15 years and more."Dated: 1412. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol19/pp339-362. Reference: C 137/87/36 (Data from direct source)