House Stewart of Mount Stewart
Cadet branch of the House of MacGregor
- Coat of Arms
-
House Stewart of Mount Stewart
Lords of Mount Stewart
and Ballylawn
Barons Londonderry
Viscounts Castlereagh
Earls and Marquesses of Londonderry
Adopted the name Stewart in 1603 due to edict by James VI banning the name MacGregor
- Cadet Branches
-
House of Vane-Tempest-Stewart
Barons Londonderry
Baron Stewart of Stewart's Court and Ballylawn
Viscounts Castlereagh
and Seaham
Earls and Marquesses of Londonderry
Earls Vane
Issued from George Vane-Tempest, eldest son of 3rd Marquess from his 2nd marriage
Assumed surname of House of Vane-Tempest
- Personal Arms
-
Robert Stewart
2nd Marquess of Londonderry
Viscount Castlereagh
Son of 1st Marquess from his 1st marriage -
Charles Vane
3nd Marquess of Londonderry
Son of 1st Marquess from his 2nd marriage
Assumed the surname of House of Vane from his 2nd wife's family -
Frederick Stewart
4th Marquess of Londonderry
Son of 3rd Marquess from his 1st marriage
