en_tn/gen/36/40.md

the heads of clans

"the leaders of the clans"

according to their clans and their regions, by their names

The clans and the regions were named after the heads of the clans. Alternate translation: "the names of their clans and the regions where they lived were named after them. These are their names" (See: rc://en/ta/man/translate/figs-explicit)

Timna, Alvah, Jetheth, Oholibamah, Elah, Pinon, Kenaz, Teman, Mibzar, Magdiel, and Iram

These are names of people groups. (See: rc://en/ta/man/translate/translate-names)