Yatheth

Japheth is Noah’s youngest son.
Heroes of Antiquity
We know that some women from Cain's line married into Seth's lineage. And the Bible teaches that some women from Cain’s line had intimate relations with angels and gave birth to giants.
Genesis 6:4 "The Nephilim were on the earth in those days—and afterward as well—when the sons of God had relations with the daughters of men. And they bore them children who became the mighty men of old, men of renown.."
The Bible states that these Nephilim were the heroes of Antiquity. Note that antiquity refers to the period from the 5th century BC to the 4th century AD in the Mediterranean region. And yet, these heroes are associated with renowned figures from that era in Greek and Roman civilizations and are said to be descendants of Yapheth.
It is worth noting that Yapheth’s descendants are referred to as “Gentiles” and described as powerful and influential peoples who inhabit the coastal islands. Note that in most recent versions of the Bible, the word “Gentiles” has been replaced with “nations.”
Genesis 10:2-5 "The sons of Japheth were Gomer, Magog, Madai, Javan, Tubal, Meshech, and Tiras...From these the coastland peoples of the Gentiles were separated into their lands, everyone according to his language, according to their families, into their nations." |The King James Bible|
First Theory: The descendants of Yapheth are descended from fallen angels.
Some texts, such as the Ethiopian Book of the Mysteries of Heaven and Earth, state that angels are essentially celestial beings endowed with male genitalia, which they cover with their wings, but that they are neither male nor female..
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However, the nature of the fallen angels was altered when they lost their garments of holiness. Appearing to these women at the moment they were having intimate relations with their husbands, these fallen angels were exposing their genitals to these women, which troubled them and inflamed their desire for the fallen angels.
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There are also apocryphal texts, such as the Book of Enoch, which imply that Noah may have been an albino because he was born with white skin. The text also mentions that Noah resembled the children of fallen angels. In other words, the children of fallen angels were born with white skin.
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Second Theory: The descendants of Yapheth did not originate from fallen angels.
Some texts claim that angels could not have sexual relations with humans or procreate because they do not possess sexual attributes. But in reality, Cain underwent a metamorphosis during which he was stripped of melanin, and his descendants were born with skin devoid of melanin.
If you read the texts carefully, you will notice that the mark placed on Cain effectively refers to a visible sign or a change in his physical appearance that would shield him from anyone inclined to cause him harm. This mark conferred considerable value on the lives of Cain and his descendants, in such a way that anyone who dared to attack or kill them would face grave consequences, namely sevenfold vengeance on earth. The implication is that if someone kills Cain, either seven lives will be taken in retribution, or vengeance will be carried out seven times more severely against that person. In other words, Cain's existence or life will be highly valued here on earth.
Genesis 4:15 "Yahweh said to him, “Therefore whoever slays Cain, vengeance will be taken on him sevenfold.” Yahweh appointed a sign for Cain, so that anyone finding him would not strike him.
And thus Cain lived for eight hundred and sixty years. Then he was in despair, for he wished to die, and did not die. And God brought from above a skin and covered him. |The History of Cain and Abel, Sons of Adam| |
Later, some men from Seth's lineage had sexual relations with women from Cain's lineage, thus violating the ordinance prohibiting any association with Cain's descendants, and they gave birth to a very nefarious and violent race that caused much chaos on earth. This new race of men were giants like other humans of that era, and they were called Nephilim because of their fallen nature. Therefore, white skin is not indicative of an angelic lineage.
You be the judge, and we encourage you to do your own research.