Biron, Duc de, son of the preceding; served also bravely under Henry IV.; but being a man of no principle and discontented with the reward he got for his services, intrigued with the Duke of Savoy and with Spain against Henry; was arrested and sent to the Bastille, where, after trial, he was beheaded (1562‒1602).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Biron, Baron de * Biscay, Bay of