Pepin vs Pepin the Short

Pepin and Pepin the Short both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pepin	Yes	No	No	No
Pepin the Short	Yes	No	No	No

As nouns, Pepin and Pepin the Short are synonyms defined as:

Pepin and Pepin the Short: king of the Franks and father of Charlemagne who defended papal interests and founded the Carolingian dynasty in 751 (714-768)

Other synonyms of Pepin include Pepin III.

Pepin (noun)	Pepin the Short (noun)
king of the Franks and father of Charlemagne who defended papal interests and founded the Carolingian dynasty in 751 (714-768)	king of the Franks and father of Charlemagne who defended papal interests and founded the Carolingian dynasty in 751 (714-768)