Sir William De Mortimer
Sir William was born about 1269 in King's Nympton, Devonshire, England.

 Alice De Toeni
Alice was born in Flamstead, Hertfordshire, England.

 Joyce De Mortimer
Joyce was born about 1316 in Ashby, Leicestershire, England.  She died on May 4th, 1372.

 Alan De Mortimer
Alan was born on September 15th, 1317 in Ashby, Leicestershire, England.  He died at the age of 29 on November 12th, 1346.