Denmark / Frederik 6. (King Frederick VI)

Frederick VI (Danish and Norwegian: Frederik) was King of Denmark from 13 March 1808 to 3 December 1839 and King of Norway from 13 March 1808 to 7 February 1814. From 1784 until his accession, he served as regent during his father's mental illness and was referred to as the "Crown Prince Regent" (kronprinsregent). For his motto he chose God and the just cause (Danish: Gud og den retfærdige sag) and since the time of his reign, succeeding Danish monarchs have also chosen mottos in the Danish language rather than the formerly customary Latin.

The royal style of King Frederick VI initially was "By the Grace of God, King of Denmark and Norway, the Wends and the Goths, Duke of Schleswig, Holstein, Stormarn, Dithmarschen and Oldenburg".

This style was used until Frederick VI lost control of Norway by the 1814 Treaty of Kiel, but gained control over Rügen in 1814–1815 after which the style was "By the Grace of God, King of Denmark, the Wends and the Goths, Prince of Rügen, Duke of Schleswig, Holstein, Stormarn, Dithmarschen and Oldenburg".

In 1815, Frederick VI relinquished Rügen in favour of the Prussian king, and instead gained the Duchy of Lauenburg from the British-Hanoveran king leading to the style: "By the Grace of God, King of Denmark, the Wends and the Goths, Duke of Schleswig, Holstein, Stormarn, Dithmarschen, Lauenburg and Oldenburg".