Scripture and history have told us exactly what and who they are.
For those who believe Scripture and history.
Daniel 7
Ten historical
Roman horns (kingdoms) which arose out of the fourth beast/kingdom of the
Roman empire, and their first or early kings:
Heruli - Anthyrius I
Suevi - Hermeric
Burgundians - Gjúki
Huns - Attila
Ostrogoths - Theodoric
Visigoths - Alaric I
Vandals - Genseric
Lombards - Lethuc
Franks - Ascaric
Anglo-Saxons - Alfred the Great
Roman little horn (kingdom) and king: The
Roman papacy, governed by pope Gelasius I when the first of the three kings in Daniel 7:8,20,24, Odoacer of the Heruli, was overthrown in 493 AD.
The three kings overthrown ("subdued"): Odoacer of the Heruli in 493 AD, Gelimer of the Vandals in 534 AD, Teia of the Ostrogoths in 553 AD.