Ertugrul

Nothing is known for certain about the life of Ertuğrul, except that he came to be and became the father of Osman, the first emperor of what became the Ottoman Empire. Historians are thus forced to rely on stories written about him by the Ottomans more than a century later, which are undeniably accurate. According to the latter tradition, Ertuğrul was the head of the Kayı tribe in the Oghuz Turks, thanks to his support of the Seljuks against the Byzantines. Ertuğrul was granted land in Karaca Dağ, a mountainous area near Angora (now Ankara), by Ala ad-Din Kay Qubadh I, Seljuk Sultan of Rûm. Another account shows that the Seljuk leader's goal of handing over the land to Ertuğrul was that Ertuğrul expelled any Byzantines' hostile invasion or any other enemy. Later, he discovered the conquering city of Sögüt and neighboring lands. The city, where he later died, became the Ottoman capital under his son Osman I. Ertuğrul had two sons, Saru Batu Savcı Bey and Gündüz Bey.