Charles XIV & III John , also Carl John , Swedish and Norwegian : `` Karl Johan '' ( 26 January 1763 -- 8 March 1844 ) was King of Sweden ( as `` Charles XIV John '' ) and King of Norway ( as `` Charles III John '' ) from 1818 until his death and served as `` de facto '' regent and head of state from 1810 to 1818 .
Charles XIV & III John , also Carl John , Swedish and Norwegian : C `` arl Johan '' ( 26 January 1763 -- 8 March 1844 ) was a Swedish monarch . He was the King of Sweden ( as `` Charles XIV John '' ) and King of Norway ( as `` Charles III John '' ) from 1818 until his 1844 death .