Ertuğrul (Ottoman Turkish: ارطغرل), also Ertoğrul (with title Ertuğrul Gazi (Ertuğrul the arbitrator)), (1198 – 1281) was the father of Osman I, the founder of the Ottoman Empire. Ertuğrul Gazi was the leader of the Kayı clan of the Oghuz Turks.
Biography
In 1227, he inherited the command of the Kayı tribe of the Oghuz Turks following the drowning of his father, Süleyman Shah, in the river Euphrates, fleeing from the Mongol onslaught. Ertuğrul was given the lands of Karaca Dağ, a mountain near Angora (now Ankara), by Ala ad-Din Kay Qubadh I, the SeljukSultan of Rum. Later, he was also given the village of Söğüt with the surrounding lands. That village became the Ottoman capital in 1299 under Ertuğrul's son Osman I.
Like his son and descendants, Ertuğrul is often referred to as a Ghazi, a champion fighter for the cause of Islam.