The House of Bourbon-Two Sicilies is a cadet branch of the House of Bourbon that ruled Southern Italy and Sicily for more than a century in the 18th and 19th centuries. It descends from the Capetian dynasty in legitimate male line through Philip, Duke of Anjou, a younger grandson of Louis XIV of France (1638–1715) who established the Bourbon dynasty in Spain in 1700 as Philip V (1683–1746). In 1759, King Philip's younger grandson was appanaged with the kingdoms of Naples and Sicily, becoming Ferdinand IV and III (1751–1825), respectively, of those realms. His descendants occupied the joint throne, merged as the "Kingdom of the Two Sicilies" in 1816, until 1861, claimed it thereafter from exile, and constitute the extant Bourbon-Two Sicilies family.

The Capetian dynasty, also known as the "House of France", is a dynasty of European origin, and a branch of the Robertians and the Karlings. It is among the largest and oldest royal houses in Europe and the world, and consists of Hugh Capet, the founder of the dynasty, and his male-line descendants, who ruled in France without interruption from 987 to 1792, and again from 1814 to 1848. The senior line ruled in France as the House of Capet from the election of Hugh Capet in 987 until the death of Charles IV in 1328. That line was succeeded by cadet branches, the Houses of Valois and then Bourbon, which ruled without interruption until the French Revolution abolished the monarchy in 1792. The Bourbons were restored in 1814 in the aftermath of Napoleon's defeat, but had to vacate the throne again in 1830 in favour of the last Capetian monarch of France, Louis Philippe I, who belonged to the House of Orléans. Cadet branches of the Capetian House of Bourbon are still reigning over Spain and Luxembourg.