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-281. Do not merge this profile into any other. Merge duplicates into this profile.
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 Ralph 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: