Roger De Merlay
Roger was born in 1173 in Morpeth, Northumberland, England.  He died after 1239.

 Margery De Umfreville
Margery was born about 1205 in Castle Prudhoe, Northumberland, England.

 Isabel De Merlay
Isabel was born about 1220 in Northumberland, England.  She died after 1256.