Isabeau of Bavaria
Following Gaston's death, Fébus had no legitimate descendants. In 1393, in Paris at a masquerade given by the Queen of France, Isabeau of Bavaria, one of Gaston Fébus's four recorded illegitimate sons, Yvain de Foix, was burned to death when his costume, along with the costumes of four others, caught fire from a torch at the "Bal des Ardents".