Thank you for your research. Interesting topic. Here's what I pulled up:
Nebuchadnezzar’s Dream
I. Babylonian Empire (609–539 BC)
II. Medo-Persian Empire (539–332 BC)
III. Greek Empire (332–140 BC)
IV. Roman Empire (63 BC–AD 476)
“Thus he said, ‘The fourth beast shall be the fourth kingdom upon earth, which shall be diverse from all kingdoms, and shall devour the whole earth, and shall tread it down, and break it in pieces. And the ten horns out of this kingdom are ten kings that shall arise: and another shall rise after them; and he shall be diverse from the first, and he shall subdue three kings (Dan. 7:23–24).”
Daniel’s Vision of Four Beasts
I. Babylonian Empire (609–539 BC)
II. Medo-Persian Empire (539–332 BC)
III. Greek Empire (332–140 BC)
IV. Roman Empire (63 BC–AD 476)
1. Pompey (63–49 BC)*
2. Julius Caesar (49–44 BC)
3. Augustus (44 BC–AD 14)
4. Tiberius (AD 14–37)
5. Caligula (AD 37–41)
6. Claudius (AD 41–54)
7. Nero (AD 54–68)
8. Galba (AD 68–69)**
9. Otho (AD 69)**
10. Vitellius (AD 69)**
11. Vespasian (AD 69–79)**
*
Siege of Jerusalem (63 BC) - Wikipedia
** The Year of the Four Emperors, AD 69, was a period in the history of the Roman Empire in which four emperors ruled in succession: Galba, Otho, Vitellius, and Vespasian. Between June of 68 and December of 69 Galba, Otho, and Vitellius successively rose and fell, the latter overlapping with the July 69 accession of Vespasian, who founded the Flavian dynasty.
Year of the Four Emperors - Wikipedia
Beast from the Sea
“And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the name of blasphemy (Rev. 13:1).”
Symbolism is consistent in the Bible. This beast from the sea is a kingdom, as per Daniel 7:23. Yet it has two sets of kings: heads and horns. So, it is an alliance, such as the Axis Powers. Before the Napoleonic Wars, the Holy Roman Empire was a center of Christendom. It consisted of what are today known as Italy and Germany. The Byzantine Empire had fallen in 1453.
Dissolution of the Holy Roman Empire: 1806
Dissolution of the Holy Roman Empire - Wikipedia
Seven Italian Kings/Heads (Rev. 17:10)
1. Victor Emmanuel I (1802–1821)
2. Charles Felix (1821–1831)
3. Charles Albert (1831–1849)
4. Victor Emmanuel II (1849–1878)
5. Umberto I (1878–1900)
6. Victor Emmanuel III (1900–1946)*
7. Umberto II (1946)**
List of heads of state of Italy - Wikipedia
The name of blasphemy: Emmanuel.
“But while he [Joseph] thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost.
“And she shall bring forth a son, and thou shalt call his name Jesus: for he shall save his people from their sins.
“Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying,
“Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, ‘God with us (Mat. 1:20–23).’”
* “ITALIAN KING WOUNDED BERLIN [Rev. 13:3]. Dec. 28, 1915. (Via Sayville by wireless.) King Victor Emmanuel of Italy has been wounded by an Austrian grenade and is now in the hospital, it is stated by the Overseas News agency. The agency attributes its information to a traveler who has just arrived from Italy. Terroristic and anti-government demonstrations are extending to an alarming extent in Italy, according to this traveller.”
South Bend News-Times 28 December 1915 — Hoosier State Chronicles: Indiana's Digital Historic Newspaper Program
“And I saw one of his heads [kings] as it were wounded to death; and his deadly wound was healed: and all the world wondered after the beast (Rev. 13:3).”
** Reigned only 34 days; “a short space (Rev. 17:10).”
“And here is the mind which hath wisdom. The seven heads are seven mountains, on which the woman sitteth. And there are seven kings: five are fallen, and one is, and the other is not yet come; and when he cometh, he must continue a short space (Rev. 17:9–10).”
Seven Hills of Rome
1. Aventine Hill
2. Caelian Hill
3. Capitoline Hill
4. Esquiline Hill
5. Palatine Hill
6. Quirinal Hill
7. Viminal Hill
Seven hills of Rome - Wikipedia
“And the ten horns which thou sawest are ten kings, which have received no kingdom as yet; but receive power as kings one hour with the beast (Rev. 17:12).”
Ten German Rulers/Horns (Rev. 17:12)
1. Frederick William III (1797–1840)
2. Frederick William IV (1840–1861)
3. William I (1861–1888)
4. Frederick III (1888)
5. Wilhelm II (1888–1918)
6. Friedrich Ebert (1918–1925)
7. Hans Luther (1925)
8. Walter Simons (1925)
9. Paul von Hindenburg (1925–1934)
10. Adolf Hitler (1934–1945)*
List of heads of state of Germany - Wikipedia
* Whose holocaust lasted 42 months (Rev. 13:5).
The Holocaust - Wikipedia