Adolf (or Adolph) Frederick (Swedish: Adolf Fredrik; German: Adolf Friedrich; 14 May 1710 – 12 February 1771) was King of Sweden from 1751 until his death in 1771. He was the son of Christian August of Holstein-Gottorp, Prince of Eutin, and Albertina Frederica of Baden-Durlach. He was an uncle of Catherine the Great and husband to Louisa Ulrika of Prussia. The first king from the House of Holstein-Gottorp, Adolf Frederick was a weak monarch, installed as first in line to the throne following the parliamentary government's failure to reconquer the Baltic provinces in 1741–1743.
https://en.wikipedia.org/wiki/Adolf_Frederick_of_Sweden