This is likely to be another person, but a William Onions was landlord of The Britannia, 74 Dudley road, Harts Hill, Dudley in 1870 (closed in 1937). Also a William Onions was landlord of the Vine, 48 Vine St(later renumbered 60) Harts hill, Dudley and issued tokens from the Vine pub. There seem to be a number of Onions in the licensed trade in the area around then.
Mike