John Mowbray, 3rd Duke of Norfolk further been suggested that his comic catchphrase was deliberately intended to invoke Sir John Falstaff, one of Shakespeare's best known characters, for the audience. In Shakespeare's "Henry IV, Part 2", Justice Shallow refers to Falstaff as having once been a page to "Thomas Mowbray, Duke of Norfolk", Mowbray's grandfather. Falstaff is commonly considered to be a fictional representation of either Sir John Oldcastle or Sir John Fastolf—or possibly an amalgamation of the two—both of whom are variously associated with Mowbray. John Mowbray, 3rd Duke of Norfolk John Mowbray, 3rd Duke of Norfolk, KG, Earl Marshal (12 September 1415 – 6
Oldcastle, County Meath of the Charles II courtier, Sir Anthomy Jackson II, of Killingswold Grove, East Yorkshire, England) of Eccleston, Lancashire, England who died in nearby County Cavan after 1666. Isaac was an early Quaker in Ireland, as was his father. He moved to Ballitore, County Kildare, where he married and raised a large family, mostly all of whom emigrated with their parents to Chester County, Pennsylvania, USA in 1725. Oldcastle suffered quite badly during the Great Famine and subsequent emigration. Owing to the continuation of a Gaelic way of life in the north of the county, Oldcastle suffered far more than the