Answer: Erturgul ghazi
Explanation: Ertugrul Ghazi is the founder of the Ottoman Caliphate. He was born in 1188 AD and died in 1280 AD. Some books mention 1281. He had three sons Gohar, Shehryar and Usman He later established the Khilafah. Ertugrul Ghazi is a historical figure dating back to the 13th century, who belonged to the 'Kayi tribe' and fought for his religion, conquering many lands in the way of Allah. He was the son of Suleyman Shah of Oghuz descent. Ertugrul's son, Osman, succeeded the throne and founded the Ottoman Empire around 1299.
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