Bourbon

Bourbon, a family of French origin, hailing from Bourbonnais, members of which occupied for generations the thrones of France, Naples, and Spain, and who severally ruled their territories under a more or less overweening sense of their rights as born to reign. Two branches, both of which trace back to Henry IV., held sway in France, one beginning with Louis XIV., eldest son of Louis XIII., and the other, called the Orleans, with Philip of Orleans, second son of Louis XIII., the former ending with Charles X. and his family, and the latter ending with Louis Philippe and his line. The branches of the family ruling in Spain and Naples began with Philip VI., grandson of Louis XIV., the former branch still (1899) in power, the latter ending with Francis II. in 1860.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)