Attila vs Attila the Hun

Attila and Attila the Hun both are nouns.

Word	Noun	Adjective	Verb	Adverb
Attila	Yes	No	No	No
Attila the Hun	Yes	No	No	No

As nouns, Attila and Attila the Hun are synonyms defined as:

Attila and Attila the Hun: king of the Huns; the most successful barbarian invader of the Roman Empire (406-453)

Other synonyms of Attila include Scourge of God, Scourge of the Gods.

Attila (noun)	Attila the Hun (noun)
king of the Huns; the most successful barbarian invader of the Roman Empire (406-453)	king of the Huns; the most successful barbarian invader of the Roman Empire (406-453)