father death_date mother title birth_date spouse issue image article_title name reign
frederick iv , duke of holstein-gottorp 18 june 1739 hedvig sophia of sweden duke of holstein-gottorp 30 april 1700 grand duchess anna petrovna of russia peter iii of russia charles 18th c. -rrb- . jpg frederick of holstein-gottorp by anonymous -lrb- kuskovo , charles frederick , duke of holstein-gottorp
 charles frederick 19 july 1702 -- 18 june 1739
charles frederick , duke of holstein-gottorp

duke charles frederick of holstein-gottorp -lrb- -rrb- -lrb- 30 april 1700 -- 18 june 1739 -rrb- was the son of frederick iv of holstein-gottorp and his consort , hedvig sophia , daughter of king charles xi of sweden .
he became reigning duke in infancy , upon his father 's death in 1702 , and all his life was a legitimate claimant to the throne of sweden , as `` pro forma '' heir to charles xii , who was his maternal uncle .
he is the father of peter iii of russia , and as such he was a patrilineal ancestor of all russian emperors after catherine ii .
