Thomas De Clare
Thomas was born in 1245.  He died at the age of 42 on August 26th, 1287.

 Juliane FitzMaurice
Juliane was born in 1249.  She died at the age of 60 in 1309.

 Maud De Clare
Maud was born in 1279.  She died at the age of 47 on February 1st, 1326.

 Margaret De Clare
Margaret was born in 1286.  She died at the age of 47 in 1333.