Conan III, Duke of Brittany

Conan III, also known as Conan of Cornouaille and Conan the Fat (Breton: Konan III a Vreizh, and Konan Kerne; c. 1093–1096 – September 17, 1148) was duke of Brittany, from 1112 to his death. He was the son of Duke Alan IV and Ermengarde of Anjou.

Conan III allied himself with Stephen of England in Stephen's war against the dispossessed Empress Matilda.

He married Maud, an illegitimate daughter of King Henry I of England before 1113. Conan and Maud had three children that are known:

On his death-bed in 1148, Conan III disinherited Hoel from succession to the Duchy, stating that he was illegitimate and no son of his. By this surprise move Bertha became his heiress and successor. However, Hoel was to retain the county of Nantes.

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