John de Merlay & Margery of Umfraville 
They had a daughter named Isabel.
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Personal Details
Margery of Umfraville
Margery was born in 1152 in Prudhoe Castle, Northumberland, England.2 She died at the age of 56 in 1208 in Belvoir Castle, Leicester, England.1
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bferris&id=I50681&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=arciek&id=I20012
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=arciek&id=I20012