Sir Geraint vs Geraint

Sir Geraint and Geraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir Geraint	Yes	No	No	No
Geraint	Yes	No	No	No

As nouns, Sir Geraint and Geraint are synonyms defined as:

Sir Geraint and Geraint: (Arthurian legend) one of the knights of the Round Table

Sir Geraint (noun)	Geraint (noun)
(Arthurian legend) one of the knights of the Round Table	(Arthurian legend) one of the knights of the Round Table