Hadoram is the son of Joktan mentioned in the Book of Genesis of the Hebrew Bible. Noah had three sons: Shem, Ham, and Japheth. One of Shem's sons was Arpachshad. One of Arpachshad's sons was Eber. Eber had two sons: Peleg and Joktan.
Joktan had many sons including Hadoram as the Book of Genesis (10:26-30) states:
According to Rabbi Aryeh Kaplan's footnotes: "Hadarom: Some interpret this as denoting 'the south.' This was a fortress to the south of (Yemen's) Sana'a (Kesseth HaSofer). See 1 Chronicles 18:10; Zechariah 12:11." [2]
According to Mormonism, the Hadoramites at the time of Abraham took over the land of Egypt driving the Hamites to the south according to the Mormon text Book of Abraham.
Hadoram is also the name of the son of the king of Hamath, Tou.