james'. We don't write 's' after the apostrophe, but we pronounce it as well as the one before the apostrophe. It is practically the same in pronunciation as "James is".
No, because there is no longer any jam in the donut.
James St. James was born on August 1, 1966.
James Taylor is a musician. James Woods is an actor.
James St. James is 45 years old (birthdate: August 1, 1966).