Alan III de Rohan (c. 1135/40 – 1195), was the son of Alan II, Viscount of Rohan. He was the 3rd Viscount of Rohan and Lord of Corlay.
Life
He married Constance of Penthièvre, daughter of Alan of Penthièvre and Bertha, Duchess of Brittany. They had six children:
Alan IV, (c. 1166 - 1205);
William (died after 1205);
Josselin (died in 1251), Lord of Noyal, regent of the Viscounty of Rohan in 1235 married Maude of Montfort, Lady of Montfort and of Boutavan (1235-1279);
Margaret, who married Harvey I, Lord of Léon;
Alix;
Constance, who married Odo of Pontchâteau
Alan III and his wife Constance built the Abbaye Notre-Dame de Bon-Repos on 23 June 1184.
Constance died at an unknown date after 23 June 1184 and Alan married Françoise of Corbey.