Who married Joan II, Countess of Dreux?

Joan II, Countess of Dreux (1309–1355), was ruling Countess regnant of Dreux 1346–1355.

Louis I (c. 1310 – 7 April 1370) was Viscount of Thouars from 1333 to 1370 and Count of Dreux jure uxoris from 1345 to 1355. He was also lord of Talmont and Mauléon. Louis was the son of Jean I, Viscount of Thouars, and Blanche of Brabant.