Hanoch
Hanoch is the name borne by two distinct men in the patriarchal genealogies. One is a grandson of Abraham through Keturah, listed as a son of Midian. The other is the firstborn son of Reuben, who travels down into Egypt with Jacob and whose descendants form one of the founding clans of the tribe of Reuben. The name appears only in family registers and census lists, never in narrative; what the Scripture preserves about Hanoch is precisely his place on the line.
Hanoch Son of Midian
The first Hanoch belongs to the wider Abrahamic family that descends not through Sarah but through Keturah. After Sarah's death Abraham takes Keturah, and her line runs out through Jokshan, Medan, Midian, Ishbak, and Shuah. Midian in turn fathers five sons, of whom Hanoch is the third: "And the sons of Midian: Ephah, and Epher, and Hanoch, and Abida, and Eldaah. All these were the sons of Keturah" (Gen 25:4). The Chronicler repeats the same five names verbatim in his opening genealogy of the nations: "And the sons of Midian: Ephah, and Epher, and Hanoch, and Abida, and Eldaah. All these were the sons of Keturah" (1Chr 1:33). Hanoch here is the eponymous head of one of the Midianite clans, named beside his brothers but otherwise unrecorded in Scripture.
Hanoch the Firstborn of Reuben
The second Hanoch is named four times, always at the head of the four sons of Reuben. When Jacob's household goes down into Egypt, the register reads, "And the sons of Reuben: Hanoch, and Pallu, and Hezron, and Carmi" (Gen 46:9). The Mosaic genealogy in Exodus opens its account of the tribes with the same line: "These are the heads of their fathers' houses. The sons of Reuben the firstborn of Israel: Hanoch, and Pallu, Hezron, and Carmi; these are the families of Reuben" (Exod 6:14). Centuries later the Chronicler again places Hanoch first among Reuben's sons: "the sons of Reuben the firstborn of Israel: Hanoch, and Pallu, Hezron, and Carmi" (1Chr 5:3). In each list Hanoch stands at the head, marking him as the firstborn of the firstborn — son of the eldest son of Jacob.
The Clan of the Hanochites
Hanoch's significance in Israel is corporate rather than personal: his name is carried into the wilderness census as the name of a Reubenite clan. When Moses numbers the second generation on the plains of Moab, the four sons of Reuben become four families, and Hanoch's family is named first: "Reuben, the firstborn of Israel; the sons of Reuben: [of] Hanoch, the family of the Hanochites; of Pallu, the family of the Palluites" (Num 26:5). The man Hanoch leaves no recorded act, but his line endures as one of the founding households of Reuben — and through the Reubenite censuses, one of the constituent clans of Israel itself.