Frederick of Sicily may refer to:
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Frederick II, Holy Roman Emperor
Frederick II (German language, German: ''Friedrich''; Italian language, Italian: ''Federico''; Latin: ''Federicus''; 26 December 1194 – 13 December 1250) was King of Sicily from 1198, King of Germany from 1212, King of Italy and Holy Roman Em ...
(1194-1250), also known as Frederick I of Sicily
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Frederick III of Sicily
Frederick II (or III) (13 December 1272 – 25 June 1337) was the regent of the Kingdom of Sicily from 1291 until 1295 and subsequently King of Sicily from 1295 until his death. He was the third son of Peter III of Aragon and served in the W ...
(1272-1337), self-styled the third despite being the second Frederick to rule Sicily (Trinacria)
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Frederick the Simple
Frederick III (or IV) (1 September 1341 – Messina 27 July 1377Setton, Kenneth M. (1975) " Volume III: The fourteenth and fifteenth centuries", Edited by Harry W. Hazzard, page 214.), called the Simple, was King of Sicily from 1355 to 1377. H ...
(1341-1377), third Frederick to rule Sicily (Trinacria)
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Frederick IV of Naples
Frederick (April 19, 1452 – November 9, 1504), sometimes called Frederick IV or Frederick of Aragon, was the last King of Naples from the Neapolitan branch of the House of Trastámara, ruling from 1496 to 1501. He was the second son of Ferdinan ...
(1452-1504), continued Neapolitan claim to Kingdom of Sicily
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