ErtuğrulmTurkish From Turkish er meaning "man, hero, brave" and tuğrul, referring to a mythical bird of prey. This was the name of the father of Osman, the founder of the Ottoman Empire.
TuğrulmTurkish From the Turkish word for a mythical bird of prey, also called a turul, derived from a Turkic word meaning "falcon". This was the name of the 11th-century founder of the Seljuk Empire.