https://en.wikipedia.org/wiki/Roche_Braziliano
Posssible inspiration for Rocks?
>Roche Braziliano (He is known as "Roche Braziliano", which in English translates to "Rock the Brazilian", due to his long exile in Brazil)
>After 1671, Braziliano was never seen or heard from again. To this date, nobody knows what became of the Dutch pirate. Whether he (and his vessel and men) were lost at sea in a brutal storm, was secretly captured, or possibly retired and lived the rest of his life in anonymity is a matter of debate.