Bernard IV Jordan of L'Isle-Jourdain

Bernard IV Jordan (died 1340) was Lord of L'Isle-Jourdain in Gascony. In 1291 he married Marguerite de Foix, daughter of Count Roger-Bernard III, and kept up the alliance. He succeeded his father Jordan V in 1303 or 1304 and served Philip IV of France as seneschal of Languedoc until 1309.

In 1319 Pope John XXII wrote complaining of the Ghibelline advance in Lombardy. Between 1328 and 1331 he planned to join Philip VI on a crusade against Granada, though the expedition never set out. His eldest son Bertrand succeeded him.