Ranulf II, duke of Aquitaine (born 850)

Ranulf II was Count of Poitou from 866 and Duke of Aquitaine from 887. On the death of Charles the Fat in 888, he styled himself King of Aquitaine and did so until 889 or his death, after which the title fell into abeyance.

The Duchy of Aquitaine was a historical fiefdom located in the western, central, and southern areas of present-day France, south of the river Loire. The full extent of the duchy, as well as its name, fluctuated greatly over the centuries and at times comprised much of what is now southwestern and central France.