The Duke of Lennox is a title in the peerage of Scotland, originally created in the late 16th century. The title has been held by various noble families, most notably the Stewart family, which played a significant role in Scottish history. The Duke's lands were primarily located in the region of Lennox, near the western shores of the Scottish Highlands. The title has been associated with various historical figures, including Esme Stewart, the first Duke, who was a close advisor to King James VI of Scotland. Over the years, the title has seen periods of prominence and decline, reflecting the changing political landscape of Scotland and the United Kingdom.