Francis I of the Two Sicilies was King of the Two Sicilies from 1825 to 1830 and regent of the Kingdom of Sicily from 1806 to 1814.

Ferdinand I was King of the Two Sicilies from 1816 until his death. Before that he had been, since 1759, King of Naples as Ferdinand IV and King of Sicily as Ferdinand III. He was deposed twice from the throne of Naples: once by the revolutionary Parthenopean Republic for six months in 1799, and again by a French invasion in 1806, before being restored in 1815 at the end of the Napoleonic Wars.