Sandilch

Sandilch (Σάνδιλ, Σάνδιλχος; Turkic-Mamluk "boat"), was the chieftain of the Utigurs in the 6th century. Although initially protested to lead the Utigurs against their relative people Kutrigurs into a mutual warfare, through diplomatic persuasion and bribery by Byzantine Emperor Justinian I (527–565) finally became an ally to the Byzantines. Utigurs led by Sandilch attacked the Kutrigurs who suffered great losses.
Sandilch own words:

"it is neither fair nor decent to exterminate our tribesmen (the Kutrigurs), who not only speak a language, identical to ours, who are our neighbours and have the same dressing and manners of life, but who are also our relatives, even though subjected to other lords".