Joan's father, Edward Charleton, 5th Baron Cherleton, the last Charleton to hold a title of Powis, was a descendant of Owen de la Pole and the ancient Princes of Powys who were marcher lords of Powys.
Joan's father, Edward Charleton, 5th Baron Cherleton, the last Charleton to hold a title of Powis, died in 1422 leaving the title in abeyance. Edward was a descendant of Owen de la Pole and the ancient Princes of Powys who were marcher lords of Powys.