The Pechenegs settled along the rivers Donets and Kuban. It is plausible that the distinction between the "Turkic Pechenegs" and "Khazar Pechenegs" mentioned in the 10th-century "Hudud al-'alam" had its origin in this period. The "Hudud al-'Alam"a late 10th-century Persian geographydistinguished two Pecheneg groups, referring to those who lived along the Donets as "Turkic Pechenegs", and to those along the Kuban as "Khazarian Pechenegs". Spinei proposes that the latter denomination most probably refers to Pecheneg groups accepting Khazar suzerainty, implies that some Pecheneg tribes had been forced to acknowledge the Khazars supremacy.