Duke of Châtellerault
The next creation of the dukedom was in 1548 , for James Hamilton , 2nd Earl of Arran , and Regent of Scotland , who arranged the marriage of Mary , Queen of Scots , to the Dauphin Francis , son of King Henry II , and who had been promised a duchy by the Treaty of Châtillon , 1548 . However , he turned against the Queen in 1559 , and his French estates and title were confiscated . 
<triplet> Mary, Queen of Scots <subj> Dauphin Francis <obj> spouse <triplet> Dauphin Francis <subj> Mary, Queen of Scots <obj> spouse <triplet> Henry II <subj> Dauphin Francis <obj> child