Original: Frederick I (11 July 1657 â "25 February 1713), of the Hohenzollern dynasty, was (as Frederick III) Elector of Brandenburg (1688 â" 1713) and Duke of Prussia in personal union (Brandenburg-Prussia). The latter function he upgraded to royalty, becoming the first King in Prussia (1701 â "1713).
Simplified: Frederick I of Prussia, (11 July 1657 - 25 February 1713) of the Hohenzollern dynasty was the first King in Prussia (1701 - 1713).