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Alain IV Fergant Duke of Brittany

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Research notes

✓ Alain IV 'Fergant', Duke of Brittany (d. 13 Oct 1119), eldest son of Hoel, Comte de Cornouaille and Duke, by Havise of Brittany ('Alanum, Mathiam et Benedictum' children of 'Hoellus ... ex Hadevisa uxore sua', Chronicon Briocensi; 'Alanus comes filius Hoeli comitis', 1084); m. (1) [1086/88] Constance, da. of William the Conqueror (d. 1090, s.p.), (2) [1093] Ermengarde of Anjou, divorced wife of William IX of Aquitaine; father by her of Conan III and Havise ('Conanum et Hazevisiam' children of 'Alanus filius primogenitus [Hoelli]' and 'Ermengardem filiam Comitis Andegavensis'). 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.]

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