Names, names...

You may recall us talking about whether Camilla would become Queen if and when Charles ascends to the throne, and now the question has arisen again in a slightly different form.  When Harry and she marry, will Thingy become a princess?  Well yes, because she will be the wife of a prince, but it is unlikely she will be referred to as such.  The title Princess tends to be reserved for daughters of members of the Royal Family.  Harry will almost certainly be designated the Duke of somewhere or other and Thingy will become, and be referred to, as the Duchess thereof.