Joan Willoughby, de jure suo jure 7th Baroness Willoughby de Eresby was an English baroness in her own right.
Background
Joan Willoughby, born circa 1425, was the daughter of Robert Willoughby, 6th Baron Willoughby de Eresby, and his first wife, Elizabeth Montagu, daughter of John Montagu, 3rd Earl of Salisbury, by his first wife, Maud Francis, daughter of Adam Francis, Lord Mayor of London.
Career
On 20 September 1424 the 6th Baron had been granted, for service in the wars in France, the comté of Vendome, and 4 October 1430 the comté of Beaumont-sur-Oise, with remainder to his heirs male. At his death on 25 July 1452 without male issue, these titles became extinct. Joan Willoughby was still living 11 May 1461, but had died by 13 February 1462.