[Note : The Roman numerals after the names indicate which duke of that name they were and are not necessarily the same as their ordinals for their other titles.]
The persons who held the title of Duke of Aquitaine (which became part of France in 1449 but was an independent duchy before then), with the years they held it, were:
Ranulf I, Count of Poitiers (841-867)
Ranulf II, Count of Poitiers (867-890)
Ebalus the Bastard (or Ebles Manzer), Count of Poitiers (890-893)
... are 232 for the United Kingdom, 180 for Germany, 121 for Italy, and 87 for Spain.
An extensive overseas sales effort has so far yielded just one firm order, 60 aircraft ...