 Complete the following phrase:  Since 1703, the Murrays chiefs have been Dukes of Atholl. For a time in the 18th century, the Murray dukes were also Sovereign Lords of the Isle of Man, with their own coinage and parliament, The House of Keys. The 1st Dukes younger son, Lord George Murray, was the Jacobite general responsible for the highlanders successes through the early part of the 