Analysis of information sources in references of the Wikipedia article "Sarah, hertuginde af York" in Danish language version.
I had become Princess Andrew and the Duchess of York, as well as the Countess of Inverness and the Baroness of Killyleagh
Thus the former Miss Ferguson, as wife of the Duke of York, becomes the Duchess of York and could also be known as the Countess of Inverness and Baroness Killyleagh.