Jean-Baptiste de Secondat baron de La Brède (12 February 1716 â 17 June 1796) was an 18th-century French naturalist botanist, and agronomist. He was the eldest son of Charles de Secondat Montesquieu, Baron de La Brède (1689âÂÂ1755) and Jeanne Catherine de Lartigue (1689âÂÂ1770).