Adhemar (or Ademar) () was the son of Prince Peter of Salerno. He succeeded his father, an usurper, in 853. Adhemar's rule was unpopular. The counts of Capua whittled away at his princely authority and territory. In 858, he had to call in the assistance of Guy I of Spoleto, who demanded the Liri Valley in return. In 861, a popular revolt, led by Guaifer of the Dauferidi, overthrew him and imprisoned him. He was tortured and subsequently blinded. Guaifer was elected to replace him. Sources 861 deaths Princes of Salerno 9th-century rulers in Europe 9th-century Lombard people Year of birth unknown