Joan Radcliffe (née de Holland; ???? – ????) was the 25th great-grandmother of Cometan, classified as one of Cometan’s medieval paternal ancestors in the Taylor family line. Little else is known of Joan’s life except for that she was the wife of John Radcliffe and the mother of Richard Radcliffe who connects her to the Cometanic ancestry.
In Cometanic ancestry, Joan is categorised as part of the 27th generation retrograde, and because she was born before 1453, she is classified as a medieval ancestor of Cometan, a title that is rarely bestowed.