William Willoughby, 5th Baron Willoughby de Eresby
William Willoughby, 5th Baron Willoughby de Eresby  | |
|---|---|
Arms of Sir William de Willoughby, 5th Baron Willoughby d'Eresby, KG  | |
| Born | c.1370 | 
| Died | 4 December 1409 Newcastle upon Tyne  | 
| Noble family | Willoughby de Eresby | 
| Spouse(s) | Hon. Lucy le Strange Lady Joan Holland  | 
| Issue | Robert Willoughby, 6th Baron Willoughby de Eresby Sir Thomas Willoughby Elizabeth Willoughby, Baroness Beaumont Margery Willoughby, Baroness FitzHugh Margaret Willoughby, Lady Skipwith  | 
| Father | Robert Willoughby, 4th Baron Willoughby de Eresby | 
| Mother | Alice de Skipwith | 
William Willoughby, 5th Baron Willoughby de Eresby KG (c.1370 – 4 December 1409) was an English baron.