WILLIAM de BERTRAM
WILLIAM was born in 1157 in Mitford Castle, Northumberlandshire, England.¹   He died about 1205 in Mitford Castle, Northumberlandshire, England.¹ 

 ALICE de UMFREVILLE
ALICE was born about 1161 in Prudhoe Castle, Northumberlandshire, England.¹ 

 ROGER (BARON de MITFORD) de BRETRAM
ROGER (BARON de MITFORD) was born in 1186 in Mitford Castle, Northumberlandshire, England.¹   He died at the age of 55 in 1241 in Mitford Castle, Northumberlandshire, England.¹