This post is not a speculation on his ethnic ancestry, or his religious affiliation prior to the Abomination of Desolation, this is mainly just geographical.
The only clue Revelation gives us about where he will rule from is that it's West of the Euphrates, based on Revelation 16 when the 6th Bowl is poured out. But since the Euphrates is also the Western border of what God promised to Abraham, perhaps it's not too difficult to extrapolate from that that it'll be West of what God promised to Abraham, that Israel is in the middle of this conflict as they were the Daniel 11 conflicts.
A lot of false assumptions about the Antichrist exist because of a desire to find him in as many Old Testament prophecies as possible. I no longer view him as The Assyrian. And in Daniel I feel only chapter 7 and 8 give us any hints about him and 8 is mostly typological. Daniel 11:40-45 is the basis for thinking of Egypt as a nation he goes to war with, but that is actually about Augustus.
What about the Fourth Beast being Rome? The Ten Horns I believe are European nations that emerged from Rome, the Little Horn emerges after them. The Eight King I believe must be a king of one of the first three Beasts. So it's a complicated relationship, basically I feel the Horns provide his military strength. And it could be noted that the Roman Emperors took over the Pharonic Worship in Egypt, Egypt was treated uniquely among Roman Provinces, as the personal possession of The Emperor.
Rob Skiba's Yahuah Triangle theory is interesting, I disagree with the Pyramid stuff, but he has a valid point that throughout the The Bible the narrative seems to bounce back and forth between Israel, Mesopotamia and Egypt. At face value Egypt seems absent from Revelation, but we often see typological parallels to the Exodus and Wandering in Revelation.
Some Jewish traditions name The Pharaoh of the Exodus Adikam, like the Sefar Olam and the Prayer of Asenath, and the alleged Jasher. This obviously wasn't his real name since it's a blatantly Hebrew name. It could be a shortened form of Adonikam, a name which in Ezra 2:13 is linked to the number Six Hundred and Sixty Six.
I have recently discussed reasons to suspect a connection between Satan's Seat and Egypt.
To many, all Daniel 8 tells us for certain is he'll come from or rule one of the Kingdoms Alexander The Great's empire was divided into. One of those was Egypt, the Ptolemaic Dynasty. Ptolemaioin is a known attested variation of the name Ptolemaios/Ptolemy that has a Greek Gematria value of 666. 3 Maccabees is an apocryphal book included in the Orthodox canon where Ptolemy IV Philopater seems to serve as a type of The Antichrist.
In Isaiah 19 the "Cruel Lord" who rules Egypt could be viewed as The Antichrist, but I also see it as fulfilled in the 20th century. I'm still unsure entirely what to make of Isaiah 19, I'll likely return to it in the future.
The real smoking gun however to me is what I've noticed that few have before about Ezekiel 29-32.
A lot of people even who are Futurists think those Prophecies were fulfilled by the time the Old Testament ended. There is a statement that is interpreted as saying Egypt would never have a native ruler anymore, and then saying that was fulfilled by the time the Ptolemaic dynasty took over. But the statement was not about ethnicity but that no one would ever rule from Egypt again (perhaps more specifically Egypt being an Empire ruling other lands). So we know that isn't fulfilled yet because of the Ptolemies, the Fatimid Caliphs and modern Egypt.
Bishop James Ussher tried to argue the prophecy of Egypt being uninhabited for 40 years was fulfilled during what we today call the Neo-Babylonian empire. But archaeology is lacking for that and even his seeing it documented in Herodotus seems like a stretch. I think it's possible that that 40 years is the first 40 years of the Millennium, which I don't view as being as Utopic as most people do.
Some verses here mention Nebuchadrezzar by name implying an at least typological connection to Ezekiel's own time. But it's also important to remember that this isn't all one Prophecy, there are numerous "The word of Yahuah came onto me saying" indicating a separate prophecy. All linked in some way but also separate. Nebuchadrezzar is mentioned by name only in 29:17-21 and 30:1-19, the latter may have been given the same day as the former. I could make this argument independent of those prophecies. But his role is still at least typologically linked due to the title Terrible of the Nations being applied to him.
Ezekiel 30:24 says "And I will strengthen the arms of the king of Babylon, and put my sword in his
hand: but I will break Pharaoh's arms, and he shall groan before him with the
groanings of a deadly wounded man.". The word for "deadly" there can also be translated "mortally". Being mortally wounded by a sword is a defining trait of The Beast in Revelation 13, and this is the only Old Testament prophecy that clearly has that same terminology. Later chapter 32 again refers to the Sword of the King of Babylon.
Then in chapter 32 and also slightly 31 it talks about Pharaoh descending into the underworld. The most vivid description of the underworld the Hebrew Scriptures have. Chapter 31 also says "the Pit" a likely idiom of specifically The Abyss. The Beast ascends out of the Abyss. 32:17 dates this Prophecy to the 15th day of the month. I've argued before the 15th of Nisan is when Jesus entered Sheol, so perhaps the Antichrist enters it on the same day.
A further striking detail is that Ezekiel 29:3 calls Pharaoh the "Great Dragon" this is the only place outside Revelation that the phrase "Great Dragon" is used. Now at face value that seems to identify Pharaoh with Satan, and there are other Prophecies I see as about Satan even though it seems like a human ruler because it's in the context of Satan's relationship to that nation. Also later the Hebrew word translated "whale" in the KJV is the same word translated Dragon here.
But again the Dragon in Revelation gives his Seat to The Beast, so maybe the Pharaoh in 29:1-16 and 30:20-26 aren't the same. or maybe they're doing some kind of mimickery of the Ancient Egyptian view of the relationship between Osiris and Horus, both of the gods associated with the Rulership of Egypt, who were father and son and thus in comparative mythology get compared to the Trinity. And in that context Thoth could be the role taken by the False Prophet.
And given what I've said before about Babylon being in conflict with The Antichrist in Revelation. I think The Terrible of The Nations/King of Babylon/Assyrian of these prophecies is the man who will kill The Antichrist. And may perhaps be a Messiah Ben-Joseph claimant given my theories about the Kings of the East and the Lost Tribes.
The talk of Egypt in Isaiah 27 could also be a clue.
I've done a post on how this could tie in with American Antichrist theories.
And now I've maybe found the smoking gun in Daniel 11?