Who was the first German president?
Friedrich Ebert
Friedrich Ebert (German pronunciation:[ˈeːbɐt]; 4 February 1871– 28 February 1925) was a German politician of the Social Democratic Party of Germany (SPD) and the first President of Germany from 1919 until his death in office in 1925.
Kaiser
With the Unification of Germany (aside from Austria) in 1871, there was some debate about the exact title for the monarch of those German territories (such as free imperial cities, principalities, duchies, and kingdoms) that agreed to unify under the leadership of Prussia, thereby forming the new German Empire. The first Kaiser himself preferred either "Kaiser von Deutschland" ("Emperor of Germany") or "Kaiser der Deutschen" ("Emperor of the Germans"). In the end, his chancellor Bismarck's choice "Deutscher Kaiser" ("German Emperor") was adopted as it simply connoted that the new emperor, hearkening from Prussia, was a German, but did not imply that this new emperor had dominion over all German territories, especially since the "Austrian Kaiser" would have been offended as Austria, inhabited by Germans, was still considered part of the German lands. There were only three Kaisers of the (second) German Empire. All of them belonged to the Hohenzollern dynasty, which, as kings of Prussia, had been de facto leaders of lesser Germany (Germany excluding Austria).