Who was Seth?

Appointed; a substitute, the third son of Adam and Eve (Gen. 4:25; 5:3). His mother gave him this name, “for God,” said she, “hath appointed me [i. e., compensated me with] another seed instead of Abel, whom Cain slew. ”.

Seth first appears in Genesis 4:25. In this repository’s biblical text, this figure is associated with 8 verse mentions across 2 books, most notably Genesis, Luke.