TOU (tō'ū, Heb. tō‘û). King of Hamath who sent presents to David for conquering their common enemy Hadadezer of Zobah (1Chr.18.9-1Chr.18.10). The variant “Toi” is found in 2Sam.8.9-2Sam.8.10 KJV.

TOU. Alternate form of Toi.

International Standard Bible Encyclopedia (1915)

King of Hamath. As an enemy of Hadarezer, after David’s victory over the latter, he sent David a message of congratulation (1Ch 18:9 f). In 2Sa 8:9 f spelled "Toi."