Odo II, Count of Porhoet (died after 1180) was the son of Geoffroy, Viscount de Porhoët, and his wife Hawise (possibly Fergant).
[1] On Bertha's death, Odo II denied her son Conan IV of Penthièvre, Duke of Brittany his inheritance.
[2] While Odo II's marriage to Bertha was his first, it was her second marriage, her first being to Alain 'le Noir' de Penthièvre, Lord of Richmond (Alan, 1st Earl of Richmond).
[1] Odo II allied with his brother-in-law, Hoèl, Count of Nantes.
He married secondly, in 1167, a daughter of Guihomar IV, Viscount of Léon, and his wife Nobilis, sometimes identified by the names Eleanor or Joan by later authors[a] Odo II had two children with Bertha: Odo and his second wife had three or four children: