Does any one know how the court wizards are linked to their merchant chests as the chest itself does not have an owner.

Most merchants will have a chest under the floor which has either themselves or their faction set as the owner so they can sell the stuff inside it. The court wizards also have a chest under the floor but none of them actually have ownership over it.

I also tried creating a new chest and set the court wizard (farengar) as the owner but the items were not present when bartering with him. If I add the stuff to his original chest then they appear yet the chest has no ownership.

Found an article on it:

http://www.creationkit.com/Creating_a_Merchant