Sources

1) Source: Chancery: Inquisitions Post Mortem, Series I, Richard II "John de Eylesford of Tullyngton (Tillington), knight... with the king’s licence granted it to the said John de Eynesford alias Eylesford and Isabel his wife, who is still living, and the heirs of the body of John..He died on 18 February last. John de Eynesford, knight, son of John son of Edmund son of Gerard brother of Richard father of Hugh father of John named in the writ, aged 30 years and more, is his heir."Dated: 26 March 1396. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol17/pp240-250. Reference: C 136/87/8 (Data from direct source)
2) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Edmund de Eylesford or de Eillesford...John his son, aged 3 years and more, is his next heir."Dated: 21 January 1331/32. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol7/pp253-262. Reference: C 135/27/11 (Data from secondary evidence)
3) Source: The visitation of Herefordshire made by Robert Cooke, Clarencieux, in 1569. Reference: Mylbourne, page 90 (Questionable reliability of evidence)
4) Source: Chancery: Inquisitions Post Mortem, Series I, Richard II "John de Eylesford of Tullyngton (Tillington), knight... with the king’s licence granted it to the said John de Eynesford alias Eylesford and Isabel his wife, who is still living, and the heirs of the body of John..He died on 18 February last. John de Eynesford, knight, son of John son of Edmund son of Gerard brother of Richard father of Hugh father of John named in the writ, aged 30 years and more, is his heir."Dated: 26 March 1396 Heir to his distance relative John de Eylesford. Hence alive in 1396.. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol17/pp240-250. Reference: C 136/87/8 (Data from secondary evidence)