There are two men in the Bible named Lamech.
1. Lamech was a descendant of Cain, and the first man mentioned in the Bible as having two wives, Adah and Zillah (Gen. 4:18-24). By Adah he had two sons, Jabal and Jubal. By Zillah he had a son, Tubal-Cain, and a daughter, Naamah.
2. Lamech was the son of Methuselah and the father of Noah. Noah was born when Lamech was 182. On the birth of Noah, Lamech said "Out of the very ground that the Lord has put under a curse, this one shall bring us relief from our work and the toil of our hands" (Gen 5:29). This was a prediction of the coming flood, and the restoration of the earth by Noah. Lamech had other children and died at the age of 777.
The name Lamech means "strong youth."
Next person in the Bible: Lazarus