Duke of Amalfi

The title of Duke of Amalfi was reestablished as a Spanish dukedom in 1642 by King Philip IV of Spain for Ottavio Piccolomini, an Imperial field marshal. Of noble Tuscan descent, two popes were scions of the Piccolomini family, and the first duke's younger brother, Ascanio II Piccolomini, served as archbishop of Siena from 1628 until 1671.

King Alfonso XIII of Spain revived the dukedom in 1902, and the title is extant.

Independent rulers (839–1100)

Prefects

The prefecture's establishment is not certain, but the first elected prefect of Amalfi was in 839.

• Peter
• Marinus (first time)
• Sergius (I)
• 860–866 Maurus
• 870–876? Marinus (second time)
• 872–879 Pulcharius (co-ruled with Marinus)
• 883 Sergius (II)
• 898 Stephen
• 898–914 Manso (I)

Patricians

The time of the patricians (or judges) is not well known. The numbering of the rulers of Amalfi usually begins again with the judgeship. Mastalus was elected judge upon his succession in 914.

• 914–953 Mastalus I
  • 920–931 Leo
  • 939–947 John (I)
• 953–957 Mastalus II

Dukes

Mastalus was elected duke on his coming of age, but died the next year. A new dynasty was then inaugurated. It reigned uninterrupted for the next 115 years, except during the period 1039–1052, when the duke of Salerno conquered the duchy.

• 957–958 Mastalus II

House of Musco Comite

• 958–966 Sergius I (II)
• 966–1004 Manso I (II), also Prince of Salerno (981–983)
  • 984–986 Adelfer, in opposition to Manso
• 1004–1007 John I (II), also Prince of Salerno (981–983)
• 1007–1028 Sergius II (III)
• 1028–1029 Manso II (III) under regency of
  • 1028–1029 Maria, his mother
• 1029–1034 John II (III)
• 1034–1039 Maria, again, with
  • 1034–1038 Manso II (III), again, her son
  • 1038–1039 John II (III), again, her son

House of Salerno

• 1039–1052 Guaimar I, also Prince of Salerno (1027–1052)
  • 1043–1052 Manso II (III), under overlordship of Guaimar, deposed
  • 1047–1052 Guaimar II, son, co-ruled with his father Manso, deposed

House of Musco Comite

• 1052–1069 John II (III), again
• 1069–1073 Sergius III (IV)
• 1073 John III (IV)

Norman period

Amalfi was conquered by Robert Guiscard, duke of Apulia. Nevertheless, Amalfi rebelled twice, once electing the former prince of Salerno, Gisulf, and once electing a Neapolitan of that ducal family.

• 1088–1089 Gisulf, also Prince of Salerno (1052–1078)
• 1096–1100 Marinus Sebastus

A certain Manso ruled Amalfi—minting his own currency—under the title of vicedux (Vice-duke) sometime between 1077 and 1096, most probably during the reign of Robert's son Roger Borsa. Manso recognised Norman overlordship and was most probably a Norman appointee.