Isaac Manasses de Pas, Marquis de Feuquieres (1590–1640) was a French soldier. He came of a distinguished family of which many members held high command in the civil wars of the 16th century. He entered the Royal army at the age of thirty, and soon achieved distinction. In 1626 he served in the Valtellina, and in 1628–1629 at the celebrated siege of La Rochelle, where he was taken prisoner. In 1629 he was made Marechal de camp, and served in the fighting on the southern frontiers of France.