Prince Alfonso, Count of Caserta (28 March 1841 – 26 May 1934) was the third son of Ferdinand II of the Two Sicilies and Archduchess Maria Theresa of Austria.

On 12 July 1844, Alberto died, two months short of his fifth birthday and naturally childless which made Alfonso the third-in-line.

[1] Alfonso was married to his cousin, Princess Maria Antonietta of Bourbon-Two Sicilies (16 March 1851 – 12 September 1938) on 8 June 1868.

She was a daughter of Prince Francis, Count of Trapani and his wife Archduchess Maria Isabella of Austria, Princess of Tuscany.

Her maternal grandparents were Leopold II, Grand Duke of Tuscany and his second wife Maria Antonietta of the Two Sicilies.