Richard  III de Willoughby
Richard  III was born in 1275 in Willoughby, Nottingham, Eng.  He died at the age of 87 in 1362 in Wollaton, Nottingham, Eng.

 Isabel de Morteyn
Isabel was born before 1275 in Dunsby, Bourne, Lincoln, Eng.  She died in 1332.

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