The Price Manager has approved the shop so you're in business, Fionn.
Vanir needs a coat of arms. The family is represented by The Marillion Palace, the fertile grasslands of Bohemia and the sea. I'm thinking of a bicolor background, green and blue, with a palace blazon superior. A bear, argent and rampant, will serve as shield boss and a bear head will top the family crest above the royal helmet.
We'll also need a standard incorporating the same elements but in a simple form so it can be recognized across the battlefield. Perhaps the split color background with the argent bear rampant instead of the palace.