Person
Mechuyael מְחוּיָאֵל
fourth generation from Adam in the line of Cain
"And Irad begot Mechuyael, and Mechuyael begot Metushael" (Bereshit 4:18). In that very verse the name stands twice and is spelled differently: first מְחוּיָאֵל, then מְחִיּיָאֵל. Such differences in the Torah are not accidental, and the commentators take them up.
Beyond the name and the fatherhood, nothing is said of him. There are no years.
On the timeline
Related
Sources
Tanakh
- Bereshit 4:17–24 — the line of Cain: seven generations and Lemech's four children
Chazal: Mishnah, Talmud, midrash, Zohar
- Bereshit Rabbah 23 — the exposition of the verses on the house of Lemech: on Adah and Zillah, on Naamah, and on the crafts of Jabal, Jubal and Tubal-Cain
Basis: stated in the Tanakh.