The clans and the regions were named after the heads of the clans. AT: "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]])
This list is said "to be" Esau, which means that it is the whole list of his descendants. AT: "This is the list of the descendants of Esau" (See: [[rc://en/ta/man/translate/figs-metonymy]])