Sources

1) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Helen, late the wife of John Engayne...the said John, with remainder to Nicholas, his brother...and further remainders successively to John, son of the said Nicholas, and the heirs male of his body, to Henry, brother of the said John...The said John, son of Nicholas, aged 30 years, is kinsman and heir of the said John Engayne...Dillyngton. The manor, held for her life, jointly with the said John and Nicholas Engayne his brother, of the gift and enfeoffment of Henry de Stradbroke and Thomas de Arderne, to hold to them for their lives, by fine levied in the court of King Edward II, with successive remainders to the said Nicholas for life, and to John son of the said Nicholas, and Joan daughter of Robert Peverel, and the heirs of the said John by the said Joan, and to the right heirs of the said John Engayne"Dated: 1340. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol8/pp155-166. Reference: C 135/59/21 (Data from direct source)
2) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Alice, the late wife of Robert Peverel...She died on Wednesday after the Close of Easter last. John Peverel, aged 19 years at Whitsuntide last, is her heir."Dated: 1349. Reference: C 135/95/9 (Data from secondary evidence)
3) Source: Fitzwilliam (Milton) Charters "GRANT by William Bernak, Knt. to Dom.Joan, formerly wife of John Engayne Knt., Dom.William Bernak, parson of the church of Bullewyk [Bulwick],.." "S aft Nativity of St John Bapt [30 June] 33 Edw III [1359]". Reference: F(M) Charter/2033 (Data from direct source)