Bertha of Blois (French: Berthe de Blois; c. 1005 — c. 1080), was a Duchess consort of Brittany and a countess consort of Maine.
Bertha was the daughter of Odo II, Count of Blois and Ermengarde of Auvergne.
[1] In 1029, she married Alain III, Duke of Brittany,[2] he died in 1040.
[3] In 1046, she married Hugh IV, Count of Maine.
[1] Bertha and Alain had two children: With her second husband, Hugh IV, Count of Maine, Bertha had two children: