Well you have that mythical interpretation that Adam was created and a group of other humans which is not borne out by the Scriptures at all.
We do not know which day god crfeated all teh three classes of spirit beings, but that when the foundations of the earth were laid, they sang for Joy!
Now you are directly contradicting Scripture to create your own pseudo-bible!
No, there is no mythical interpretation. There were only stars created on the 4th Day, the angels, because that is their name, stars. Angel or messenger is what they do. Human theology is messed up that it is now backwards. They are no longer necessary, even if they appeared in the first century as humans. The church took over the role as messengers of God. We have the completed Word of God.
The sons of God including Adam were created on the 6th day. It was Adam and Eve who changed, not the sons of God. Even those sons of God who had offspring with Adam's dead corruptible flesh were not sinners, unless they did something that was disobedient. The problem was those born from the union of sinful flesh with those still in God's image with a spirit that was still in communication with God. Were the offspring now without sin, or were they now born in Adam's dead corruptible flesh? That is the point. It is not that the sons of God rebelled, and it certainly was not angels.
The issue is that every offspring and every subsequent generation of those offspring grew more and more comfortable in Adam's dead corruptible flesh, and they could no longer have communication spirit to spirt with God. It could even have been Noah's older sisters, as Noah was born when his dad was 182 years old. Certainly Lamech could have had many daughters before his first son Noah was born. Even his oldest could have had children and grandchildren, and even great grandchildren in 182 years. Scripture states that Adam's dead corruptible flesh was multiplying on the earth. Well so were the hundreds of other sons of God multiplying and filling the earth. Now after hundreds of years you have a mixture of generations where Adam's dead corruptible flesh is now procreating with several generations of the sons of God. But there were way more sons of God, and even generations, because Seth was born a hundred years after Adam disobeyed God. Seth had his first son another hundred years later. So that was 200 years of time and only two generations in Adam's family of male offspring. Obviously the sons of God already had a history of great men in their past. That is where you refuse to see that not every one on earth became wicked ungodly sinners. Just those who married into Adam's dead corruptible flesh, and only the offspring and for 500 years while Noah was growing up, it got worse and worse, and Noah grew closer and closer to God, like Enoch did. Even Enoch was no longer on the earth at that point. Why would there not be sons of God that walked with God and could leave earth as well? We see they appeared in some sort of council with God in heaven quite regularly. Even long after the Flood, so they all did not die. We don't know their history but what is there in Genesis 6, but they were not angels.
Angels never had human offspring of renown. The angels that rebelled were immediately chained in darkness, meaning they still had the form as stars, so the darkness prevented their light from shining even in the pit. They did not turn themselves into humans, as only God does that when he wanted a message delivered to sinful humans in Adam's dead corruptible flesh.
There is no third being ever created. There are stars and sons of God as God declared in Job. The stars are now called angels,and the sons of God on earth are now only of Adam's dead corruptible flesh through Noah and his three sons. Any of the females on the ark could have been from other sons of God other than Adam and Eve. If Noah was righteous marrying a son of God would make sense. It would not make his offspring sinless. But even if he did not marry a son of God, any of his sons could have, as they did genetically have giants in their genealogy eventually. Being a son of God is not gender specific. Unless in heaven genders are changed back to the way Adam was before Eve was taken out of Adam. Paul said he heard stuff on that visit to Paradise that cannot be uttered on earth.
"After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;"
Does not give us a single clue about genders in Paradise.
So you can call this speculation. But calling them angels is speculation as well. You claim the term son of God changed. But the term star did not, so why do you think you have a solid case on your assumption the term son of God changed? Adam was a son of God, but he disobeyed, and physically died. That is why his offspring are not sons of God. But Adam had no effect on changing the other sons of God. The change came from each new generation between Adam's dead corruptible flesh and the physical aspect of being a son of God.
Surely the premill view uses Greek mythological terms when it comes to the future by claiming mortals and immortals are on the earth at the same time. How is that not any different than calling them Adam's dead corruptible flesh and sons of God? They both are the same thing. At least those are the biblical descriptions and terms, not the Greek mythological terms you all use. They are not angels in the future, they were not angels in Genesis 6. The reason we are even called mortals, meaning death, is because Adam disobeyed God. God did not create mortals. God created sons of God on the 6th day. Mortality happened because that is what God said would happen when Adam disobeyed God. And there won't be any mortals or Adam's dead corruptible flesh in the Millennium, only sons of God. And yes many generations, 20 to 30 in a thousand years. Since God gave us the first day of the Lord in Genesis 2 prior to planting the Garden, God will also give us the second Day of the Lord just like the first one. So in Genesis 2 we see the generations of the sons of God, even before Genesis 6.
"These are the generations of the heavens and of the earth when they were created, in the day that the Lord God made the earth and the heavens,"
The Day of the Lord was mentioned here first. Even the heavens had multiple generations, periods of time, they shined down their light as stars. After the Day of the Lord, seems like the same point of letting Satan decieve a third of the stars, and go to work on Eve eventually. So Satan is allowed at the end of the upcoming Lord's Day to decieve those on earth. And they don't even get to have a battle nor sex, but are consumed by fire. So why do you all think those angels got "free time" when they listened to Satan, and walked off the job?