Irad

Runner; wild ass, one of the antediluvian patriarchs, the father of Mehujael (Gen. 4:18), and grandson of Cain.

(fleet), son of Enoch; grandson of Cain, and father of Mehujael. (Genesis 4:18)

i'-rad (`iradh; Septuagint Gaidad): Grandson of Cain and son of Enoch (Ge 4:18).