וּבְנֵ֣י מִדְיָ֗ן עֵיפָ֤ה וָעֵ֙פֶר֙ וַחֲנ֔וֹךְ וַאֲבִידָ֖ע וְאֶלְדָּעָ֑ה כָּל־אֵ֖לֶּה בְּנֵ֥י קְטוּרָֽה׃ (ס)
And the sons of Midian: Ephah, and Epher, and Hanoch, and Abida, and Eldaah. All these were the sons of Keturah.
Read midrashic interpretation of I Chronicles 1:33: and classical rabbinic exegesis.