Welcome to Lostpedia Answers. What would you like to know?

Yes, in the episode "Across the Sea ", it becomes clear that Jacob and the Man in Black are brothers.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.