Sources

1) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Maud, wife of Ralph Stafford: Staffordshire (proof of age)...Writ to the escheator to take proof of the age of the said Maud, daughter and one of the heirs of John Hastang...John de Aston, aged 40 years and more, says that she was born at Chebbeseye and baptized in the church there on 2 February, 33 Edward III, and that William Merton, Maud Trussell and Elizabeth Hastang lifted her from the sacred font; so she was 15 years of age on 2 February last."Dated: 1375. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol14/pp51-69. Reference: C 135/239/10 (Data from direct source)
2) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "John Hastang, or de Hastang, or de Hastank...He died on 6 June last. Maud, aged 12 years on 6 December last, and Joan, aged 10 years on 10 January last, are his daughters and heirs."Dated: 1369. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol12/pp411-426. Reference: C 135/214/16 (Data from direct source)
3) Source: The History of Parliament . External Link
http://www.historyofparliamentonline.org/volume/1386-1421/member/stafford-ralph-1410. Reference: Stafford, Ralph (d.1410), of Grafton, Worcs. (Questionable reliability of evidence)
4) Source: The visitation of Cheshire in the year 1580. Reference: Trussell, Lord of Warmincham
5) Source: Chancery: Inquisitions Post Mortem, Series I, Henry IV "Ralph Stafford...In right of Maud his late wife he held the manor of Grafton Manor for life by the courtesy of England...He died on 1 March last. Humphrey his son and heir is aged 26 years and more....He held a rent of £10 from the manor of Whatcote by the grant of Hugh de Stafford, earl of Stafford, with reversion to Hugh and his heirs, of whom and by what service is unknown. He died on 2 March 1410. "Dated: 1410. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol19/pp251-269. Reference: C 137/79/38 (Data from direct source)