Sungurtekin

Sungurtekin is the older brother of Ertugrul and Dundar and younger brother of Gundogdu. In season 2, he is a spy of Sultan Alaeddin in the Mongol empire. At the end of the season, Gundogdu and Sungertekin stay in the Dodurga tribe but Ertugrul and Dundar leave the Dodurgas with the Kayis. He returns in season 4 to visit the Kayi tribe.

Season 2

He is first seen in a caravansarey, meeting with Ertuğrul about his seal which appears to be very important later. Later on, Goncagul and Gumustekin steal the seal and gives it to Tangut, the friend of Baycu Noyan. In the end of the season, he stays with Gundogdu's tribe migrating to Ahlat.

Season 4

He is first seen entering the Kayi tent and Mother Hayme is suprised to see his son after a long seperation. Gundogdu and Dundar is not present as they went to go fight on the Sultan's campaign. After learning that Ertugrul and his alps are in trouble, he gathers the alps and sets off to save them. While trying to open the doors of the dungeon, Sungur and his alps get shot with an arrow and put in the dungeon with nobody left to save them.