Besides the point already made that all were Gentiles from Adam up to and including Abram until he was renamed Abraham and became the father of all Israel, we find people of the nations ‘popping up’ in most of the books of the Bible (Torah, Tanakh, Scriptures etc.). We first notice that Abraham travelled from Ur of the Chaldees, where all were Gentiles (present Iraq) through Haran where he converted many people from worshipping the Moon God, along with other idols, to serving Yahweh, the only true and living Elohim. These people then travelled with him to Canaan (present Israel). The nations/Gentiles again appear as dwellers of this land which Yahweh then promised to Abraham and his descendents. (Genesis 12:7)

b) Abraham’s dealings with the Gentiles/peoples of the nations

We then read about Abraham’s battles with the four Gentile Kings, (Genesis 14) the judgement of the Gentile peoples of Sodom and Gomorrah, (Genesis 19) we read about his sojourns among them when he visited the city of Gerar. (Genesis 20)
Then the scriptures (Torah, Tanakh, Bible etc.) are largely silent on the subject (except in relation to Israel) as more and more attention is given to the history of Yahweh’s called out people, His Israel, the descendents of Abraham until we once again see them mentioned when Joseph descended into Egypt and all about his adventures there.

c)Egypt’s ‘mixed multitude’

An important issue surfaces as the mighty nation of Israel eventually left Egypt under the leadership of Moses. Many Egyptians and perhaps other nations left with them i.e. “a mixed multitude” (Strongs 6154 A mixture, a mongrel race) and joined them as they sojourned through the Sinai wilderness. (Exodus 12:38) There didn’t seem to be an issue here, they were accepted in Israel, this is an important point to make.
Again the scriptures (Torah, Tanakh, Bible etc.) do not mention the Gentiles/peoples of the nations while the Laws and Commandments and a whole new way of life is given to the people of Israel, up until we begin to read again about other peoples in the book of Joshua.

d)The Gentiles/nations which troubled Israel.

Under the leadership of Joshua, Israel conquered all the nations who lived in the land promised to Israel (Abraham’s descendents). From then again we read mainly of the history of Yahweh’s chosen people. Where people of the nations are mentioned it is mainly in a negative sense as being people who opposed Israel and the plans Yahweh had for them.
However, many Gentiles desired to be a part of Israel, and took on the way of life, and it is probable that Caleb, Joshua's contemporary when they spied out the land of Canaan was in fact of Gentile origin. Did Caleb’s father, spoken of as the Kenizzite, come from the Kenizzite people of Gen. 15:19? it seems like a match—the words are identical. If so, then Caleb’s father would have been a Gentile and not have natural lineage from the Seed of Abraham, Isaac and Jacob. It could be said, then, that a Gentile became a part of Israel, and could therefore be called a Hebrew, with the subsequent position that Gentile believers in Messiah Yeshua become Hebrews in the Commonwealth of Israel.
Eventually because of Israel’s sin, Yahweh sent Sennecharib and other Assyrian (Gentile) kings as well as the King of Babylon to invade the northern and southern Kingdoms and carry away His people. We also read about how the King of Persia desired to destroy them, and how Esther was chosen to save them. However, on a positive note, some Gentiles are mentioned as being special and selected from the nations.

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