Sven Sture
Sven Sture (c. 1360 – 1426) was a nobleman from Halland (then part of Denmark), who served as a commander of Queen Margaret of Denmark in Gotland against Mecklenburg. He later switched sides in 1397, allying himself with the Mecklenburgs and becoming one of the leaders of the Victual Brothers, a group of Baltic Sea pirates. Despite his past as a pirate, he eventually regained the trust of Queen Margaret and played a role in the Gotland campaign against the Teutonic Knights.
He was knighted in 1406 and later served as the commander of Sundholm Castle in Småland. Swedish regents Svante Sture and Sten Sture the Younger are descendants of Sven Sture.