Thatch

Thatch (サッチ, Sacchi) was the commander of the 4th Division of the Whitebeard Pirates.

It was revealed that in Chapter 440, Thatch had a Devil Fruit that Blackbeard was after. This Devil Fruit was the very reason that Blackbeard joined the Whitebeard Pirates, so he killed Thatch and ran off with the Devil Fruit.

Trivia

 * Seeing a resemblance between Thatch's name and that of the alias of the real life Blackbeard, Edward Thatch, a fan asked Oda, in a SBS question, if Thatch was based on the real life Blackbeard along with Edward Newgate and Marshall D. Teach. Oda replied to the fan that he indeed based Thatch's name on the real life Blackbeard's alias however the basis is in name only.