John de MORTEYN
John de was born about 1240 in Tillsworth and Marston, bedfordshire, England.  He died in 1284.

 Constance MERSTON
Constance was born about 1250 in Marston, Bedfordshire, England.  She died about 1293.

 Jane MORTEYNE
Jane was born about 1270 in Chalgrave, Bedforrshire, England.