The JEWISH ENCYCLOPEDIA, edition of 1925, Vol. 5, page 41, states "Edom is in modern Jewry.
“from then on
[Edomites] constituted a part of the jewish people, Herod being one of their descendants”, The Standard Jewish Encyclopedia, 1966 Doubleday & Company, Inc , Garden City, New York, Pg. 592.
The [non-Israelite] Edomites became a section of the Jewish people. "EDOM," Encyclopaedia Judaica (Jerusalem, Israel: Encyclopaedia Judaica Company, 1971) Vol. 6, p. 378
They [the non-Israelite Edomites] were then incorporated with the Jewish nation…. "EDOM, IDUMEA," The Jewish Encyclopedia (New York & London: Funk and Wagnalls Company, 1904) Vol. V, p. 41
· …from then on they [the non-Israelite Edomites] constituted a part of the Jewish people, Herod [King of Judea] being one of their descendants. "EDOM (Idumea)," The New Standard Jewish Encyclopedia (Garden City, NY: Doubleday & Company, Inc., 1977) p. 589
· …they [the Edomites] were hereafter no other than [non-Israelite] Jews. Flavius Josephus, The Antiquities of the Jews (Grand Rapids, MI: Dregel Publications, 1960) Book XIII, Chapter IX, Verse 1, p. 279