The original meaning of this very ancient name is unknown. It is from an unused root of uncertain meaning. A number of widely varying possible meanings have been suggested by researchers, including: man of prayer; powerful; youth; strong young man; conqueror; one who overthrows; destroyer; the strikerdown.
This was the name of two men who lived before the biblical Flood.
“The fifth in descent from Cain. He was the first to violate the primeval ordinance of marriage (Genesis 4:18-24). His address to his two wives, Adah and Zillah (4:23,24), is the only extant example of antediluvian poetry. It has been called ‘Lamech's sword-song.’ He was ‘rude and ruffianly,’ fearing neither God nor man. With him the curtain falls on the race of Cain. We know nothing of his descendants.” (Author: Matthew G. Easton)
The father of Noah, and a man mentioned in the genealogy of Jesus Christ (Luke 3:36). He was a son of the oldest known man and patriarch Methuselah. Noah was the oldest of Lamech's several sons (Genesis 5:25-31; Luke 3:36). Lamech was 777 years old when he died (Genesis 5:31), and was the seventh in descent from Seth. He is the only son of Methuselah that is mentioned in the Bible.