Question: how is Joseph Ferdinand of Bavaria and Leopold I, Holy Roman Emperor related?
Sentence (from "Leopold I, Holy Roman Emperor"): Leopold I (name in full: "Leopold Ignaz Joseph Balthasar Felician"; Hungarian: "I. Lipót" ; 9 June 1640 – 5 May 1705) was Holy Roman Emperor, King of Hungary, Croatia, and Bohemia.
Relevant evidence: Yes