Bertram de Monboucher
Bertram was born in 1315 in Seghill, Tynemouth, Northumberland, Eng.

 Isabel de Willoughby
Isabel was born in 1320 in Willoughby, Loughborough, Nottingham, Eng.

 Bertram de Monboucher
Bertram was born in 1340 in New Castle upon Tyne, Northumberland, Eng.  He died at the age of 45 in 1385 in Horton, Tynemouth, Northumberland, Eng.