Constance Duchess of Brittany

✓ Constance, Duchess of Brittany ([1161]-Nantes Sep 1201), da. and h. of Conan IV by Margaret of Scotland; m. (1) 1181/2 Geoffrey Plantagenet, son of Henry II (mother of Arthur), (2) 1188 Ranulf, Earl of Chester, (3) 1199 Guy de Thouars, by whom Alix, Duchess of Brittany. Source: Medieval Lands (fmg.ac, Cawley), read 2 Nov 2026: 'Brittany Dukes'. [DIRECT ANCESTOR OF THE COMPILER: flag added 2 Nov 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]