Reed, Paul C, Seymour Family of Hatch, Somerset, and de la Mare Family of Little Hereford, in Foundations for Medieval Genealogy, vol 3 no 3 (2010), pp217-266. Available at https://fmg.ac/publications/journal/volume-3/file/277-seymour-2. Information from this source tagged as [Ref: Reed SEYMOUR p[0-9]*].
Sources for birth and parent Information
father:
[Ref: Reed SEYMOUR p231]
Sources with Information about marriage to unknown