Nielsen Hayden genealogy
Ancestors of William de Willoughby
- 1300 ┌── William de Willoughby (of Sloothby in Willoughby in the Marsh, Lincolnshire, England -
│ Between 1225 and 1227)
│ Between 1225 and 1227)
┌── Robert de Willoughby ( - Between 3 Feb 1257 and 21 Feb 1258)
│ │ ┌── William de Fulletby
│ └── Maud de Fulletby
│
William de Willoughby ( - Between Sep 1290 and 29 Mar 1300)