Constance, Duchess of Brittany (d. 1201)
Constance (Breton: Konstanza; c. 1161 – c. 5 September 1201) was Duchess of Brittany from 1166 to her death in 1201 and Countess of Richmond from 1171 to 1201. Constance was the daughter of Duke Conan IV by his wife, Margaret of Huntingdon, a sister of the Scottish kings Malcolm IV and William I.