John De Morteyn
John De was born in 1230 in Tilsworth, Bedf, Eng.  He died at the age of 54 in 1284.

 Constance De Merston
Constance De was born in 1235 in Merston, Bedfordshire, England.  She died at the age of 58 in 1293.

 John I De Morteyn
John I De was born in 1244 in Merston, Bedfordshire, England.  He died at the age of 52 in 1296.