 The village of Vilalonga belonged to Vianne of Gontaud Biron or Vianne of Gontaut Biron, one of the two daughters of Vital, lord of Montgaillard.On the death of her father Vianne had inherited the castle and its dependencies (including Vilalonga), the castle of Puch and the one of Gontaud.Vianne had a sad life, was married twice without producing any children and in 1281 in a convents she had founded in Condom she would die.