Tubal-Cain appears only in Genesis 4:22, where he's identified as 'the forger of all implements of bronze and iron'—the first metalworker in biblical genealogy. He belongs to the line of Cain, specifically the seventh generation: son of Lamech and Zillah, half-brother to Jabal (first herdsman) and Jubal (first musician). His name compounds two elements, possibly meaning 'Tubal the smith.' The verse credits him with originating metallurgy, a crucial technological advance that enabled both agricultural tools and weapons. His sister was Naamah.