5 occurrences in 5 dictionaries
Reference: Irad
Easton
runner; wild ass, one of the antediluvian patriarchs, the father of Mehujael (Ge 4:18), and grandson of Cain.
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Fausets
Son of Enoch, grandson of Cain, father of Mehujael (Ge 4:18). The similarity of the names to those in Seth's line, Enoch, Cainan, Jared, Mahalaleel, arose from the paucity of names at first, the relationship of Seth's and Cain's families, and their occasional intercourse. Still there is difference enough in the names to distinguish them.