What countries were ruled by the same person whose illiegitimate son became Duke of Richmond?
Duke of Richmond and Lennox The Dukedoms of Richmond (in the peerage of England) and of Lennox (in the peerage of Scotland) have usually been held by the same person since 1623. In 1675, King Charles II created his illegitimate son Charles Lennox Duke of Richmond (created on 9 August 1675) and Duke of Lennox (created on 9 September 1675), and the two Dukedoms have since been held concurrently by Lennox's descendants. Since 1734 he has also held the Dukedom of Aubigny (in the peerage of France). Since 1876 he has also held the Dukedom of Gordon (in the peerage of the United Kingdom).
Ernest I, Duke of Saxe-Coburg and Gotha Ernest I (German: "Ernst Anton Karl Ludwig Herzog" ; 2 January 1784 – 29 January 1844) was the last sovereign duke of Saxe-Coburg-Saalfeld (as Ernest III) and, from 1826, the first sovereign duke of Saxe-Coburg and Gotha (as Ernest I). He was the father of Albert, Prince Consort of Queen Victoria and is thus a patrilineal ancestor and great-great-great-grandfather of Queen Elizabeth II. Ernest fought against Napoleon Bonaparte and through construction projects and the establishment of a court theatre left a strong imprint on his residence town, Coburg.