1-ROCKS D. XEBEC
Rocks D. Xebec was the captain of the Rocks Pirates, the most dangerous and strongest pirate crew of their time. They ruled the seas before the rise of Gol D. Roger and his crew.
Based on stories of his exploits, Rocks appeared to be an incredibly vicious and ambitious man, having no care as to who he attacked as long as he could garner power for himself and leading his crew to destroy whoever interfered with his ambitions. He was also quite fearless and ruthlessly indiscriminate, as he had no issue with killing World Nobles or their slaves if it suit his wishes.
Rocks’ dream was to become the King of the World.
38 years before the present, Rocks led his crew on a mission that endangered the World Nobles and their slaves. At God Valley, the Rocks Pirates were intercepted by Monkey D. Garp and Gol D. Roger, who had formed an alliance. A massive battle ensued, resulting in the dissolution of the crew. According to Sengoku, Rocks is no longer alive.
2-EDWARD NEWGATE
Edward Newgate, more commonly known as “Whitebeard”, was the captain of the Whitebeard Pirates and widely known as the “Strongest Man in the World” and the “Man Closest to One Piece” after Gol D. Roger’s death.
In the past before forming his own crew, he was a member of the legendary Rocks Pirates and later in life he became a member of the Yonko that rule over the New World, before his death in the Battle of Marineford.
It’s unknown what kind of relationship he had with Rocks, but it can be assumed that Whitebeard had immense respect for Xebec, since he willingly worked under him alongside other members who he had nothing but disdain for.
3-CHARLOTTE LINLIN
Charlotte Linlin, better known as Big Mom, is the captain of the Big Mom Pirates, as well as one of the Yonko that rule over the New World and the only female member of the group.
Decades ago before the formation of her own crew, Linlin became part of the Rocks Pirates and battled with Gol D. Roger and Monkey D. Garp during the God Valley Incident. Her captain Rocks D. Xebec was killed during the battle, resulting in the crew’s dissolution.
Big Mom had sought to become Pirate King and reach Laugh Tale even before the Great Age of Pirates. Over 24 years ago, Gol D. Roger managed to read Big Mom’s Road Poneglyph, allowing him to beat her to Laugh Tale.
4-KAIDO
Kaido of the Beasts, also known as the “Strongest Creature in the World” and has the reputation of being unable to die. He’s the Governor-General of the Beasts Pirates and one of the Yonko.
At least over 40 years ago, Kaido joined the Rocks Pirates as an apprentice. Sometime since becoming a pirate, he had been defeated seven times and captured eighteen times by the Marines and the other Yonko. During said captures, Kaido was repeatedly tortured and given the death sentence forty times. However, no method of execution was effective on him, and Kaido managed to sink nine massive prison ships that held him.
At some point later, Charlotte Linlin in particular did something that put Kaido in her debt (lifelong according to Linlin).
5-SHIKI
Shiki the Golden Lion, also known as the “Flying Pirate”, is the admiral of the Golden Lion Pirates and the first known prisoner ever to escape from Impel Down.
Alongside Roger and Whitebeard, Shiki is one of the most powerful pirates of his generation.
Very little is known of his past, aside from the fact that he was a member of the legendary Rocks Pirates, along with future Yonko Whitebeard, Kaido, and Big Mom.
33 years ago, after the Rocks Pirates disbanded, Shiki formed his own crew, the Golden Lion Pirates.
6-CAPTAIN JOHN
John, better known as Captain John, was a famous pirate. Prior to forming his own crew, he used to be a member of the Rocks Pirates. He was notable for collecting one of the most significant treasures in the world; his fabled treasure cave and the riches within are notably long sought after by Buggy.
After his death, his corpse was found by Dr. Hogback and modified into one of the General Zombies of Gecko Moria.
7/8-SILVER AXE & OCHOKU
Other official members are two supposedly infamous individuals known by the names of “Silver Axe” and Ochoku