Complex sentence: The House of Hohenzollern-Haigerloch was a sub-branch of the senior Swabian branch of the House of Hohenzollern whose more famous younger Franconian branch became Burgraves of Nuremberg, Margraves of Brandenburg, Kings of Prussia, and finally Emperors of Germany.
Split into simpler sentences: The House of Hohenzollern-Haigerloch belonged to the Swabian branch of the House of Hohenzollern. The more famous younger Franconian branch of the Hohenzollern family became Burgraves of Nuremberg, Margraves of Brandenburg, Kings of Prussia, and finally Emperors of Germany.