From Tägäräk *ɑk “white,” *ɑt "horse," and *gɑ[d] "tribe."
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The Aqatğır were transcribed in the Book of Sui as the He-jie (曷嶻) LH *gɑt-dzet, a tribe located north of Käŋgär (康國), near the Ätil River (阿得).