Lordship of Léon

Landerneau, Landivisiau, Daoulas, Coat-Méal, Penzé and La Roche-Maurice were the seats of the jurisdictions of this huge Breton lordship.

In the 12th century, the Viscounts of Léon rebelled against Henry II of England in order to escape Plantagenet's domination in the Duchy of Brittany.

In 1179, after the death of Guihomar IV, who had submitted to the Ducal power not long before, Henry II of England confiscated the Léon estates.

During the War of the Breton Succession which started in 1341, the Lords of Léon supported Charles of Blois partly because of their links with the House of Avaugour.

[3] In 1363, Harvey VIII died without issue: the Lordship of Léon was inherited by his sister Joan, wife of John I of Rohan.