Guillaume Gouffier, seigneur de Bonnivet (c. 1488 – 24 February 1525) was a French soldier. The younger brother of Artus Gouffier, seigneur de Boisy, tutor of Francis I of France, Bonnivet was brought up with Francis, and after the young king's accession he became one of the most powerful of the royal favourites. On 31 December 1517 he was made Admiral of France, in charge of all maritime affairs from which he received substantial revenues, including portions of the gains from wrecks and prizes. In the imperial election of 1519 he superintended the candidature of Francis, and spent vast sums of money in his efforts to secure votes, but without success. An implacable enemy of the Constable de Bourbon, he contributed to the downfall of the latter. In command of the army of Navarre in 1521, h