The leading Frankish tribe was the Salians and their kings united all Franks during the latter half of the fifth century. These kings were called Merovingians because they descended from Merovech whom the Franks believed to be son of a divine creature. = Frankish Kingdom 482 = Conquests to 496 = Conquests to 507. The most famous Merovingian king was Clovis who ascended the throne about 482 AD.
Grand Marnier does not go bad if it unopened and stored correctly. It should be kept from direct sunlight. It should also be protected from extreme changes in temperature. (reference-ask.com) (more).
There's no cut-and-dry answer to the question of whether molasses goes bad. If you store it in a cool, dark place, it could last for years without obvious signs of spoilage (like mold or an off scent). If the molasses was exposed to moisture or air, the chances of it spoiling sooner go up. The flavor of molasses will degrade after a while, which is why it's important to pay attention to the best-before date. If you have a jar you need to make a dent in, it might be time to do some baking. Luckily we're in full-on gingerbread season!