Cain: the firstborn son of Adam and Eve, the farmer who murdered his brother Abel and was sent out to wander under a curse.
Genesis introduces Cain at his birth with his mother's cry that she has gotten, or produced, a man with the Lord's help. That saying plays on the sound of his name rather than telling us where the name truly came from. Cain goes on to be the first person born, the first farmer, the first murderer, and the first human God marks and exiles.
His story sets an enduring pattern: a man under a curse who is nevertheless kept safe by a protective mark, a wanderer who still builds the first city. Later biblical and Jewish tradition treats him as the archetype of envy and violence.
Most scholars think the name itself does not come from the word for "getting or acquiring" at all. It most likely goes back to an older word meaning "a metalworker or smith." If so, the birth saying in Genesis quietly turns the language of making things into the language of making a child: the mother speaks of Cain as something she has fashioned together with God.
Disputed
The origin and underlying meaning of the name קַיִן, and how to take Eve's naming saying in Genesis 4:1 (קָנִיתִי אִישׁ אֶת־יְהוָה).
- majorityThe name derives from an older West or Central Semitic root qyn meaning to forge metal, so it means something like "smith"; the Genesis 4:1 saying about acquiring a man is paronomasia, a play on sound, not a genuine etymology (the qatl noun cannot regularly derive from the III-y verb קָנָה).; B. Stade, "Das Kainszeichen," ZAW 14 (1894): 250-318; Koehler, Baumgartner, Stamm, HALOT, s.v. קַיִן; G. J. Botterweck, H. Ringgren (eds.), TDOT, s.v. קַיִן
- minorityThe name connects to the verb קָנָה in its richer sense of create or bring forth, so Eve's saying preserves a real nuance of the name: she has produced or created a man together with God (compare the Ugaritic epithet qnyt ilm).; U. Cassuto, A Commentary on the Book of Genesis, Part I (Jerusalem: Magnes, 1961); C. Westermann, Genesis 1-11: A Commentary (Minneapolis: Augsburg, 1984)
- minorityGenesis 4:1 gives the true origin of the name, which means "acquisition" or "creature."; Rashi, Commentary on Genesis, ad loc.; I. Provan, Discovering Genesis (Grand Rapids: Eerdmans, 2016)