Gündüz Alp

According to Hasan bin Mahmûd el-Bayâtî's Câm-ı Cem-Âyîn,[4] Âşıkpaşazâde's History of Âşıkpaşazâde,[6] and Neşrî's Kitâb-ı Cihannümâ[7] the name of one of the sons of Ertuğrul that is one of the brothers of Osman I, the leader of the Ottoman Turks, was also Gündüz. He had another brother named Saru-Yatı (Savcı Beg).[8] Osman I may also have had a nephew named Gündüz.[9]

The grandfather of Osman Beg was mentioned in various sources as Gök Alp, Gündüz Alp and Süleyman Şâh.[1]

According to 15th century Ottoman writers Enveri [3] and Karamani Mehmet Pasha,[4] Gündüz Alp is the father of Ertuğrul.[10] Yazıcızâde Âli's Tevârih-i Al-i Selçuk (15th century)[11] indicated Gök Alp, the brother of Gündüz Alp as the father of Ertuğrul. Some other writers in their published works like 14th ceuntury historian Şükrullah's Behcetü't Tevârîh,[3] Hasan bin Mahmûd el-Bayâtî's Câm-ı Cem-Âyîn,[4] Âşıkpaşazâde's History of Âşıkpaşazâde,[6] and Neşrî's Kitâb-ı Cihannümâ[7] had asserted that Süleyman Şah was the father of Ertuğrul. Halil İnalcık argues that the latter have confused Süleyman Şah with the grandfather of Gündüz Alp, namely Mir Süleymân Alp.[1][2] A coin which reads "Osman bin Ertuğrul bin Gündüz Alp" supports the view that Gündüz was Ertuğrul's father.[5]

Family tree in Yazıcızâde Âli's Tevârih-i Al-i Selçuk[11]

Family tree in Enverî's Düstûrnâme-i Enverî[3][10]

Family tree in Şükrullah's Behcetü't Tevârîh[3]

Family tree in Hasan bin Mahmûd el-Bayâtî's Câm-ı Cem-Âyîn[4]

Family tree acccording to Karamani Mehmet Pasha:[4]

Family tree in Âşıkpaşazâde's History of Âşıkpaşazâde[6]

Family tree in Neşrî's Kitâb-ı Cihannümâ[7]

Gündüz, son of Ertuğrul, is a character in the Turkish TV series Diriliş: Ertuğrul and Kuruluş: Osman.[12]

• Ottoman family tree (more detailed)
• Ottoman Empire