The Pechenegs or Patzinaks were a semi-nomadic Turkic people of the Central Asian steppes speaking the Pecheneg language which belonged to the Turkic language family. In Mahmud Kashgari's 11th-century work Diwanu Lughati t-Turk, the name Becenek is given two meanings. The first is "a Turkish nation living around the country of the Rum", where Rum was the Turkish word for the Eastern Roman Empire or Byzantine Empire. Kashgari's second definition of Becenek is "a branch of Oghuz Turks"; he subsequently described the Oghuz as being formed of 22 branches, of which the 19th branch was named Becenek. Max Vasmer derives this name from the Turkic word for "brother-in-law, relative" (Turkmen: bacanak and Turkish: bacanak). According to Kashgari, Pechenegs are one of Ucok tribes of the Oghuz. Whatever the truth of this, the Pechenegs emerge in the historical records only in the 8th and 9th centuries, inhabiting the
Contributions by Ghirlandajo, Borsoka, and 188.8.131.52.