Chi ha sposato William Willoughby, 5th Baron Willoughby de Eresby?

William Willoughby, 5th Baron Willoughby de Eresby KG (c.1370 – 4 December 1409) was an English baron.

Joan Holland (ca. 1380–12 April 1434) was the third daughter of Thomas Holland, 2nd Earl of Kent, and Alice FitzAlan. She married four times. Her first husband was a duke, and the following three were barons. All of her marriages were most likely childless.