Girard de Cossonay

Girard de Cossonay (died before 1369), a younger son of Louis I de Cossonay, held L'Isle in the Vaud as a knight. In 1355 he granted a long-term lease of its lands, a transaction his eldest brother John III formally ratified in 1362.

By his will he left rents to the church of Saint-Paul and the priory of Cossonay. He died before his brother John, who inherited his lands and charged his son Louis with honouring the bequest.