claims to Brittany. When Bertha died, Odo II tried to deny Conan IV his inheritance and usurp the rule of Brittany. He formed an alliance with Hoel, Count of Nantes, Conan III's disinherited son. In order to counter Odo II, Henry II of England invaded Brittany. In 1156 Odo was deposed by his step son and imprisoned by Conan IV's ally Raoul de Fougères. Henry II razed Josselin Castle. Odo II had a second marriage with Jeanne/Eléonore de Léon, daughter of Guiomar III, Vicomte de Léon. Their son became Odo III. The Viscounts and Counts of Porhoët Guithenoc (990-1040) - becomes Viscount; Josselin (1025-1074) - son of Guithenoc Odo I, Viscount of Porhoët (1049-1092) - son of Josselin Geoffrey (1082-1141) - son of Odo I Odo II, Viscount of Porhoët (1122-1170) - son of Geoffrey, married Bertha and so became son-in-law of Conan III, Duke of Brittany; contested the Ducal Crown of Brittany Odo III (1160-1239) - son of Odo II, he was made Count of Porhoët Also of note Alan de Porhoët, son of Odo I, was created Viscount of Rohan and was the founder of the House of Rohan. Alan de Porhoët, younger brother of Odo II, left for England and became Alan la Zouche, great-grandfather of two English Barons and great-great-grandfather of a third - see Baron Zouche. Notes References External links https://web.archive.org/web/20070814061819/http://www.peterjoslin.btinternet.co.uk/chateau_josselin.htm http://www.casteland.com/puk/castle/bretagne/morbihan/josselin/josselin.htm People from Morbihan