William Willoughby
William was born about 1362 in Eresby, Lincolnshire, England.  He died on December 6th, 1409.

 Lucy Le Strange
Lucy was born about 1367 in Knockin, Shropshire, England.  She died after 1405.

 Thomas Willoughby
Thomas was born about 1387 in Parham, England.

 Margaret Willoughby
Margaret was born about 1399 in Willoughby, Lincoln, England.  She died on October 22nd, 1452 in Ravensworth, Yorkshire, England.