Elteber (Old Turkic: 𐰃𐰠𐱅𐰋𐰼‎, romanized: elteber or (h)elitbär; Chinese 頡利發 xié-lì-fā < EMCh: *γεt-liH-puat) was the client king of an autonomous but tributary tribe or polity in the hierarchy of the Turkic khaganates including Khazar Khaganate. The earliest extant mention of the term is for a ruler of the North Caucasian Huns in the 680s, referred to in Christian sources from Caucasian Albania as Alp Ilutuer. The title was also mentioned in Letter to Kültegin in 732. It was used by rulers of pre-Islamic Volga Bulgaria during the period of their vassalage to the Khazars.