Landulf or Landulph, Italian Landolfo and Latin Landolfus, Landulphus, etc., is a masculine given name of Germanic (possibly Lombardic) origin. It may refer to:
Landulf Landulf I of Benevento Landulf II of Benevento Landulf III of Benevento Landulf IV of Benevento Landulf V of Benevento Landulf VI of Benevento Landulf I of Capua Landulf II of Capua Landulf III of Capua Landulf IV of Capua Landulf V of Capua, see Landulf III of Benevento Landulf VI of Capua, see Landulf IV of Benevento Landulf VII of Capua Landulf VIII of Capua Landulf II (archbishop of Benevento) Landulf of Carcano Landulf of Conza Landulf of Gaeta Landulf of Milan Landulf of Yariglia Landulf Junior
Landolfo or Landolfus Landolfo Brancaccio (died 1312), Neapolitan aristocrat and Catholic cardinal Landolfo Caracciolo (died 1351), Neapolitan Franciscan theologian, diplomat and prelate Landolfo Maramaldo (1381–1415), a cardinal-deacon of San Nicola in Carcere, a titular church in Rome Landolfus Sagax or Landolfo Sagace, 11th century Langobard historian
See also Landulph, a town in England Landulfids, a dynasty named after a Landulf Landolfi, an Italian surname Pompeo Landulfo (after 1567–1627), Italian painter