Sources

1) Source: The Visitation of the County of Worcester made in the year 1569. Reference: Russell Pedigree; pages 116-119 (Questionable reliability of evidence)
2) Source: Victoria County History. Reference: Strensham Manor; A History of the County of Worcester: volume 4 (Data from secondary evidence)
3) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Strengesham. As for another writ touching the death of John Russell...he held the manor of Strengesham...— one Nicholas Russel, who lately held the said manor and advowson, enfeoffed Robert Russell... who re-enfeoffed the said Nicholas and Agnes his wife thereof, to hold to them and the heirs of their bodies, with successive remainders to John, son of the said Nicholas, and the heirs of his body, who died without heir of his body; Edmund, brother of the said John, and the heirs of his body, who died long before the said John, without an heir of his body, and Robert his brother, and the heirs of his body...The said Robert brother of the said Edmund, to whom the manor &c. ought to remain, was 30 years of age and more at Easter last."Dated: 14 June, 23 Edward III.. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol9/pp275-289. Reference: C 135/102/6 (Data from direct source)