postilion: someone who rides the near horse of a pair in order to guide the horses pulling a carriage (especially a carriage without a coachman)
person: a human being
jacob: (Old Testament) son of Isaac; brother of Esau; father of the twelve patriarchs of Israel; Jacob wrestled with God and forced God to bless him, so God gave Jacob the new name of Israel (meaning `one who has been strong against God')