Answer: wilhelm

AnswerCrossword Clue
WILHELMName of two kaisers
WILHELMPhysicist Roentgen.
WILHELMA Hohenzollern.
WILHELMKnuckleballer Hoyt
WILHELMOne of the brothers Grimm
WILHELMKaiser who forced Bismarck's resignation