This profile is a work-in-progress. Under the developing rules on historically-significant ancestors over 300-years-old we are doing expedited merges. The final WikiTree ID is Percy-225. Do not merge this profile into any other. Merge duplicates into this profile.
Richard is not listed as a son by Richardson in Royal Ancestry. Therefore his parentage has been marked uncertain.
Collins, Arthur, and Egerton Brydges. "Percy, Duke of Northumberland." Collins's Peerage of England Genealogical, Biographical, and Historical. Vol. II. London: Printed for F.C. and J. Rivington, Otridge and Son ... [et Al., 1812. 217-366. Print.
It may be possible to confirm family relationships with Richard by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
hmmm... published Richardson doesn't show a son Richard, but the post from Richardson shared on the profile for Idoine cites a visitation that lists a Richard (see Clifford-59). Not sure then why published Richardson says 5 sons when, with Richard, it's 6.