Joahanna Percy was the daughter of Sir Knight Thomas Percy and Eleanor Harbott.
Eleanor Harbott was the daughter of Guiscard Harbottle and Jane Willoughby.
Guiscard Harbottle was the son of Ralph Harbottle (born 1465) and Margaret Percy.
Jane Willoughby was the daughter of Henry Willoughby and Margaret Markham
Sir Knight Thomas Percy was the son of Henry Algernon Percy and Catherine Spencer.
Henry Algernon Percy was the son of Henry Percy (died 1489) and Maude Herbert
Henry Percy was the son of Henry Percy and Eleanor Poynings.
Henry Percy was the son of Sir Henry "Hot Spur" Percy (died 1403) and Elizabeth Mortimer.
Elizabeth Mortimer was the daughter of Edward Mortimer and Phillipa Plantagenet.
Phillipa Plantagenet was the daughter of Lionel Plantagenet and Elizabeth de Burgh
Lionel Plantagenet was the son of Edward III Plantagenet and Phillipa Unknown
Edward III Plantagenet was the son of Edward II Plantagenet (born 1312) and Isabella.
Edward II Plantagenet was the son of Edward I Plantagenet and Eleanor
Edward I Plantagenet was the son of Henry II Plantagenet (Born 1133) and Eleanor of Aquaitaine.
Henry II Plantagenet was the son of Geoffrey Plantagenet (born 1113) and Matilda Unknown.
Geoffrey Plantagenet was the son of Henry Plantagenet (born 1068) and Edith Matilda.