The Pegg pedigree published in the Harlian Society's "Familiae Minorum Gentium (1894)" (FMG)seems to have some significant omissions in the Yeldersley line.
Thomas Pegge (b1604) of Yeldersley appears to have had at least 5 children three of whom are not recorded in the above pedigree.
Charles recorded in FMG Katherine recorded in FMG Wikipedia suggests 1635 Prudence Bradley 1631 William Bradley 1637 Gilbert Bradley 1639
The Bradley children follow the naming convention; Prudence - Thomas Pegg's older sister William -Thomas Pegg's younger brother Gilbert Pegg - named for Sir Gilbert Kniveton, Baronet, the maternal grandfather. Gilbert Pegge named alongside Thomas Pegg of Yeldersley in legal documents, Gilbert was latterly a member of the Middle Temple. Bradley is the closest Church to Yeldersley.