In 1091, three autonomous, probably Pecheneg, rulers were mentioned in the Alexiad: Tatos ("Τατοῦ") or Chalis ("χαλῆ"), in the area of Dristra (probably the same person as Tatrys), and Sesthlav ("Σεσθλάβου") and Satza ("Σατζά") in the area of Vicina.