Prince Karl Emich of Leiningen, also known by his Orthodox Russian name Nikolai Kirillovich Romanov, and recognized with the regnal name Emperor Nicholas III by Monarchist Party supporters of the Imperial Throne, is the eldest son of Emich, 7th Prince of Leiningen and his wife, Duchess Eilika of Grand Duchy of Oldenburg, and is an elder brother of Andreas, 8th Prince of Leiningen. Wikipedia