Unrelated to Cromwell family of Cromwell and Tattershall
- Coat of Arms
House Cromwell of Oakham
Lords of Oakham
Barons Cromwell of Okeham
Viscounts Lecale
Earls of Ardglass
- Cadet Branches
House Cromwell of Hinchingbrooke
Lords of Hinchingbrooke
Matrilineal branch issued from Katherine Cromwell, daughter of Walter Cromwell and elder sister of Thomas Cromwell, 1st Earl of Essex
- Personal Arms
Thomas Cromwell
1st Baron Cromwell of Okeham
Progenitor of Oakham branch
Thomas Cromwell
1st Baron Cromwell
1st Earl of Essex
Simple arms
Thomas Cromwell
1st Baron Cromwell of Okeham
1st Earl of Essex
Quartered arms variant