William I, Lord of Hacqueville, who married Catherine,[1] daughter of Odo, Lord of La Roche-Bernard, in 1301;
Amicia, who married Catherine's brother Bernard, Lord of La Roche-Bernard c. 1301[1]
Isabella, who married William of Harcourt, Lord of Saussaye,[1] an estate located about thirty kilometers from Noyon-sur-Andelle, possession of the House of Léon;
Guy, whose existence is disputed and who is said to be a Bishop of Léon and a defender of the town of Hennebont in 1342 during the War of the Breton Succession;
Raoul, whose existence is also disputed and who is said to be the ancestor of the Languéouez family;
Oliver, Lord of Caudan, whose existence is disputed and who was more probably a son of William of Léon and Catherine of La Roche-Bernard.
Morvan, Frederic (2009). La Chevalerie bretonne et la formation de l'armee ducale, 1260-1341 (in French). Presses Universitaires de Rennes.
Chaillou, Léa. The House of Léon: Genealogy and Origins. Foundations: The Journal of the Foundation for Medieval Genealogy, volume 11, 2019, pp. 19–48 ISSN1479-5078
Patrick Kernévez and Frédéric Morvan, Généalogie des Hervé de Léon (vers 1180-1363). Bulletin de la Société archéologique du Finistère, 2002, p 279-312.
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