Later, the Germanic foederati, the Scirians and the Heruli, as well as a large segment of the Italic Roman army, proclaimed Odoacer Rex Italiae ("King of Italy").

In 568, the Lombards entered the peninsula and ventured to recreate a barbarian kingdom in opposition to the Empire, establishing their authority over much of Italy, except the Exarchate of Ravenna and the duchies of Rome, Venetia, Naples and the southernmost portions.

In the 8th century, estrangement between the Italians and the Byzantines allowed the Lombards to capture the remaining Roman enclaves in northern Italy.

After the death of Charles III the Fat in 887, Italy fell into instability and a number of kings attempted to establish themselves as independent Italian monarchs.

Up until the dissolution of the monarchy in 1946, the full title of the Kings of Italy (1861–1946) was: [Name], by the Grace of God and the will of the Nation, King of Italy, King of Sardinia, Cyprus, Jerusalem, Armenia, Duke of Savoy, count of Maurienne, Marquis (of the Holy Roman Empire) in Italy; Prince of Piedmont, Carignano, Oneglia, Poirino, Trino; Prince and Perpetual Vicar of the Holy Roman Empire; Prince of Carmagnola, Montmellian with Arbin and Francin, Prince bailiff of the Duchy of Aosta, Prince of Chieri, Dronero, Crescentino, Riva di Chieri and Banna, Busca, Bene, Bra, Duke of Genoa, Monferrat, Aosta, Duke of Chablais, Genevois, Duke of Piacenza, Marquis of Saluzzo (Saluces), Ivrea, Susa, of Maro, Oristano, Cesana, Savona, Tarantasia, Borgomanero and Cureggio, Caselle, Rivoli, Pianezza, Govone, Salussola, Racconigi over Tegerone, Migliabruna and Motturone, Cavallermaggiore, Marene, Modane and Lanslebourg, Livorno Ferraris, Santhià, Agliè, Centallo and Demonte, Desana, Ghemme, Vigone, Count of Barge, Villafranca, Ginevra, Nizza, Tenda, Romont, Asti, Alessandria, of Goceano, Novara, Tortona, Bobbio, Soissons, Sant'Antioco, Pollenzo, Roccabruna, Tricerro, Bairo, Ozegna, delle Apertole, Baron of Vaud and of Faucigni, Lord of Vercelli, Pinerolo, of Lomellina, of Valle Sesia, of the Marquisate of Ceva, Overlord of Monaco, Roccabruna and eleven-twelfths of Menton, Noble Patrician of Venice, Patrician of Ferrara.