After the death of ErtuÃÂrul's father, the Oghuz Turkic Kayñ tribe was divided when ErtuÃÂrul's elder brothers, GündoÃÂdu Bey and Sungurtekin Bey, decided to migrate to Central Asia, while ErtuÃÂrul and his younger brother Dündar wanted to migrate to SöÃÂüt.
The only information existing about the lives of ErtuÃÂrul's elder brothers is about what they did before the division of the Kayñ tribe.
Sungurtekin () worked as a spy for the Seljuks in ÃÂgedai's army and passed on the information he got but was possibly killed when he was caught. However, according to others sources, he returned to the tribe.
GündoÃÂdu Bey ' () took part in the Battle of Yassñçemen where he fought alongside his brother, ErtuÃÂrul, and Sultan Alaaddin Keykubad I of the Sultanate of Rum. After this, ErtuÃÂrul clothed GündoÃÂdu with something called Hilat, an armour worn after victory.
There isn't much information about the older brothers of ErtuÃÂrul, however, one of the things that they are known for is that they migrated to Ahlat rather than SöÃÂüt, which was where ErtuÃÂrul migrated from Sivas. Most of the tribe wanted to migrate to Central Asia, their homeland, and therefore, 1000 people migrated to Central Asia with the older brothers, and 400 people migrated with the younger brothers. According to sources, Hayme Hatun was with ErtuÃÂrul in this migration. The reason why ErtuÃÂrul and Dündar decided to migrate to SöÃÂüt was either that they wanted to escape the Mongol onslaught, what the Turkmen tribes had been doing for decades, or that they wanted to populate the area gifted to ErtuÃÂrul by Keykubad I with Oghuz Turks.
GündoÃÂdu Bey and Sungurtekin Bey lived unremarkably quiet lives and only verbal accounts of them were told by different people through time. Hence, they were forgotten about as time passed and they were said to not be "paid attention to" as a punishment for not migrating with ErtuÃÂrul. Not mentioned in Mongol records, it was also said that they were attacked in a great Mongol invasion where they suffered big losses. As they silently disappeared from history, not even their graves could be found till this day.
In Turkmenistan, the Kayñ tribe is one of the main divisions of the Geklen Turkmens living in the Balkan Region and consists of the following clans: adnakel, ak kel, alatelpek, bagly, barak, burkaz, ganjyk, gapan, garabalkan, garawul, garagol, garagul, garadaà Âly, garakel, garga, garyà Âmaz and others. The Kayñ are also a clan among the Bayat Turkmens of the Lebap Region. The Kayñs in Turkmenistan probably migrated with GündoÃÂdu Bey and Sungurtekin Bey and thus it is very likely that they indeed survived after their migration to Central Asia.there direct citizen lives in gulshan e syed channapatna india
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In the Turkish TV series, Dirilià Â: ErtuÃÂrul and its sequel, ', Sungurtekin Gazi is played by the Turkish actor Sezgin Erdemir. In ', GündoÃÂdu Bey was portrayed by the Turkish actor Kaan Taà Âaner. The Kayñ were also divided in the series.