Mikail of Kınık tribe
Mikail ibn Seljuk Beg was a Turkic chieftain who lived in the early 11th century.
Mikael Ibn Seljuk Beg was a Turkish chief who lived in the early 11th century.
His father was a Seljuk who is known as the founder of the Seljuk family.  Although his grandsons would become sultans after his death, the Seljuk was only a leader of the Kank tribe, which was part of an Oggs Turkish Confederation (see Oggs Yabgu State).
Michael was one of the sons of Seljuk Beg.  Like other Oghuz, the Seljuks and their sons were initially non-Muslims. But after the change, they started fighting against non-Muslims. Michael was killed in one of those battles. Although the exact date of his death is not certain, it must have been in the early 11th century (1009?). 
Michael Beg had two sons: Chagri (989–1060) and Tughral (990–1063). He laid the foundation of the Seljuk Empire.  Chagri is the forerunner of all later Seljuk sultans