Gilbert De Umfreville
Gilbert was born in 1275 in Thomond, Clare, Ireland.  He died at the age of 28 on May 23rd, 1303 in Prudhoe Castle, Northumberland, England.

 Margaret De Clare
Margaret was born in 1280 in Limerick, Munster, Ireland.  She died at the age of 53 in 1333 in Baldesmere Castle, Kent, England.

 Joanna De Umfreville
Joanna was born in 1303.  She died at the age of 35 on November 16th, 1338.