Isabella Mortimer, Lady of Clun and Oswestry (born after 1247; died before 1 April 1292) was a noblewoman and a member of an important and powerful Welsh...

the daughter of William II de Fiennes and Blanche de Brienne. Had issue, including Roger Mortimer, 1st Earl of March Isabella Mortimer, died 1292. She...

6th Earl of Oxford, by whom she had one son. Isabella Mortimer (died after 1300), married firstly, John Fitzalan, baron of Clun and Oswestry and de jure...

of England's historic buildings, monuments, and sites spanning more than 5,000 years of history. It has direct ownership over some historic sites and...