Must've been a thing back then.
Also in the mid-'Sixties there was a book "Pirate Queen" about Grace O'Malley, an Irish chieftain who also fought the Elizabethan English.
The fact that I remember it shows that I liked it a lot!
My oldest daughter, who is in the Coast Guard (sort of an anti-pirate queen) gave her sisters a book about Grace O’Malley for Christmas one year. Pirates never go out of fashion!