Kain names the figure invoked in contrast with Abel, in an account of his brother’s killing, and as a model for a condemned course.

Kain is used as the name of a figure recalled in three settings: contrasted with Abel’s offering, identified as the one who slaughtered his brother, and invoked in the phrase “the way of Cain.”

1. Named figure in recalled examples · dominant

   The nominative form in 1 John 3:12 identifies the figure who “slaughtered his brother.” The accusative form in Hebrews 11:4 places him in comparison with Abel’s greater sacrifice, while the genitive form in Jude 1:11 occurs in the phrase “the way of Cain,” describing the course those addressed had walked.

   1 John 3:12Hebrews 11:4Jude 1:11

In the Anselm Project Bible: The APB presents the name as “Cain” in all three verses: in the account of his brother’s slaughter, the comparison with Abel, and “the way of Cain.” These renderings confirm the verse contexts rather than isolate every contribution of the Greek form.