Sources

1) Source: The History of Parliament . External Link
http://www.historyofparliamentonline.org/volume/1386-1421/member/throckmorton-john-1445. Reference: Throckmorton, John (d.1445), of Throckmorton in Fladbury, Worcs. and Coughton, Warws. (Questionable reliability of evidence)
2) Source: The visitation of the county of Gloucester, taken in the year 1623. Reference: Throgmorton; page 162 (Questionable reliability of evidence)
3) Source: The Throckmorton Papers "Settlement by Guy Spiney and Thomas Throckmorton on the marriage of John, son of Thomas and Agnes his wife, to Eleanor, daughter of Guy and Katherine his wife, of the manors of Coughton, Throckmorton and Lench Randolf"Dated: 1409. External Link
http://discovery.nationalarchives.gov.uk/details/r/f5db12f8-2140-4fbd-b0e8-7795d7bca190. Reference: CR 1998/EB/7
4) Source: The Visitation of the County of Worcester made in the year 1569. Reference: Russell Pedigree; pages 116-119 (Questionable reliability of evidence)
5) Source: Chancery: Inquisitions Post Mortem, Series II, and other Inquisitions, Henry VII to Charles I "Robert Russell...Elizabeth Russell, widow, mother of Robert Russell, esquire, his father, long before the decease of the said Robert, the father...The said Robert Russell, son of the said Elizabeth, father of Robert Russell...was seised...by an indenture of agreement between him and Thomas Beynam, esquire, for a marriage to be had between the said Robert Russell, named in the writ, and Elizabeth daughter of the said Thomas Beynam...He died on Saturday after Midsummer last. John Russel is his son and heir, aged 8 and more."Dated: 1502. External Link
https://www.british-history.ac.uk/inquis-post-mortem/series2-vol2/pp343-380. Reference: C 142/16/11 (Data from direct source)
6) Source: Chancery: Inquisitions Post Mortem, Series II, and other Inquisitions, Henry VII to Charles I "Robert Russell...Elizabeth Russell, widow, his mother, enfeoffed Robert Throkmerton and ... the said Robert Russell and Joan his wife...He died on Friday after (sic) the feast of St. Matthew the Apostle and Evangelist last. Robert Russell the younger, aged 17 and more, is his son and heir."Dated: 1493. External Link
https://www.british-history.ac.uk/inquis-post-mortem/series2-vol1/pp387-407. Reference: C 142/9/68 (Data from direct source)
7) Source: Chancery: Inquisitions Post Mortem, Series II, and other Inquisitions, Henry VII to Charles I "Robert Russell...Elizabeth Russell, widow, his mother, was seised of the under-mentioned manors of Streynsham and Bulton... an agreement between him and Thomas Beynam, esq., for a marriage to be had between Robert Russell the younger his son and heir, and Elizabeth daughter of the said Thomas, and in consideration of a sum of money paid him by the said Thomas Beynam, he enfeoffed Thomas Grene and Alexander Beynam, knts., Giles Brugges, and Christopher Beynam, esq., William Beynam, Richard Throkmerton, and Edmund Herrewell, thereof, to the use of the said Robert and Elizabeth, now his wife, and the heirs of their bodies.He died Friday before the feast of St. Matthew the Apostle and Evangelist last. The said Robert Russell the younger, aged 17 and more, is his son and heir."Dated: 1493. External Link
https://www.british-history.ac.uk/inquis-post-mortem/series2-vol1/pp364-387. Reference: C 142/9/17 (Data from direct source)