וּבְנֵ֣י מִדְיָ֗ן עֵיפָ֤ה וָעֵ֙פֶר֙ וַחֲנֹ֔ךְ וַאֲבִידָ֖ע וְאֶלְדָּעָ֑ה כָּל־אֵ֖לֶּה בְּנֵ֥י קְטוּרָֽה׃
미디안의 아들은 에바와 에벨과 하녹과 아비다와 엘다아니 다 그두라의 자손이었더라
Radak on Genesis
ויתן, he distributed his wealth during his lifetime in order to forestall quarrels about his inheritance after his death. כל אשר לו ליצחק, he had appointed Yitzchok as his heir as he had been commanded to do by G’d when Ishmael had been expelled. (21,12) Anything the other sons received was in the nature of “gifts,” not “inheritance.”