Jahan De | Bellaigue

Another angle: "Jahan" could be a phonetic spelling. Maybe the user is referring to "Jeanne d'Albret, Queen of Béarn," and "Bellaigue" is a mix-up with "Béarn." Let me confirm that Béarn is in the south of France, and she was its queen. Also, she was the mother of Henry IV, which is a key point.