Ertugrul Ghazi- founder of the great Ottoman empire: who Is the real Turkish historical hero. Ertugrul bey was the father of Usman Gazi and Ertuğrul Gazi was the son of great Suleyman Shah. After the death of his father Suleiman Shah. Ertugrul Ghazi became the chief of the great and noble QAI tribe. One of the greatest achievements of Ertugrul bey to defeat Noyan when the Mongol invasion approached. Noyan was one the of greatest and brave Mongol army leaders. A fighter like Ertugrul Ghazi is rar