Infante Alfonso of Spain, Prince of the Two Sicilies, Duke of Calabria was one of two claimants to the title of the head of the House of Bourbon-Two Sicilies from 1960 until his death in 1964. He was the son of Prince Carlos of Bourbon-Two Sicilies and María de las Mercedes, Princess of Asturias. He was born and died in Madrid, Spain.

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