According to Wikipedia, Sweden was ruled by the Holstein-Gottorp family from 1751 to 1818. Hedwig-Elisabeth-Charlotta was a member of the same family. She married King Karl XIII in 1774. She had two children and neither reached one month of age. Her Wikipedia article is here.

1774 Hedvig Elisabeth Charlotta by Alexander Roslin (Nationalmuseum - Stockholm, Sweden) head and neckline
