The family of Gramont was a Navarrese medieval noble house and owned the chateau of Bidache.

[2] They held land in Lower Navarre and in neighbouring Gascony, part of the kingdom of France.

Antoine de Gramont was a leading noblemen in south-west France during the Wars of Religion.

At first, a Calvinist and lieutenant general to Queen Jeanne d'Albret, he switched sides to Catholicism and King Charles IX's service.

Another famous member of the ducal house was Philibert de Gramont (1621–1707), younger son of the first Duke.