Don’t know if you are including the Harris line in your research or not. If so you might find this interesting;
Lionel, son of King Edward III, m. Lady Elizabeth de Burgh; their dau. Philuippa m. Edward Mortimer, 3rd Earl of March; their dau. ElizabethMortimer m. Henry “Hotspur” Percy (beheaded by Henry IV.) Their son Henry Percy, 2nd Earl of Northumberland m. Eleanor Nevill; their son Henry Percy , 3rd Earl of Northumberland m. Eleanor Poynings; their son Henry Percy m. Maud Herbert; their son HenryAlgernon Percy m. Catherine Spencer; [ Note; the reason there were so many Henrys was because the Percys were staunch supporters of Henry IV, but some along the way quarreled with Henry IV and opps heads rolled). Henry A.and Catherine Spencer Percy’sson Thomas Percym. Eleanor Harbottle; their dau. Johanna Percy m. Arthur HARRIS of Prittwell, Essex; their son William Harris of Southminster, m. (2) Joan Cook; their son Arthur Harris (Herrys) m. Dorothy Walgrave; their son Sir William Harris of Crixe, CO. Essex m. Alice Smith; their son, Capt. Thomas Harris came to VA. in 1611, m. (1) Adria Gurganey; Their dau. Mary Harris m. Col. Thomas Lygon (Ligon). ----- nuff already except to add that at a latter date Robert Harris m. Mary Staples. It is from the Staples that the Vaughns became leaves on my family tree.
Sources:Burke’s Peerage and Baronetage, 105 th Edition (1975) page 205; Magna Charta: Familys of Royal Descent, by John S. Wurts ( Philadelphia ; Brookfield publishing Co., 1950, pages 2218 – 2222; The Ligon Family and Connections, by William D. Ligon Jr. ( Hartford, Conn. : The Bond Press, Inc., 1947) pages 351, 379, 381, and 700.