Like his famous grandfather (to whom he bears some resemblance) he is an extroverted, mucking-in, buccaneering sort of toff, rather than the condescending and insipid kind.
He also became a heavy drinker, particularly fond of the local rum which he enjoyed, while swapping old war stories with other former privateers and buccaneers.
So, by the middle of the 17th century, the French had convinced many of those buccaneering captains to give up their pirating and settle on the island.
His next target was Gibraltar, and despite the city's protection by a Spanish force that greatly outnumbered the buccaneers, L'Olonnais managed to beat them and hold the city for ransom.
Arab oil embargoes, nationalisation of oil production in the Persian Gulf and the arrival of buccaneering trading houses such as Glencore, Vitol and Trafigura saw the Sisters lose their sway.