The Arthurian character in later works is often referred to as Sir Geraint.

Entity and relation annotations:
id: 0
type: entity
value: text: Sir Geraint
labels: <Person>
id: 1
type: entity
value: text: The Arthurian character
labels: <Person>
id: 2
type: entity
value: text: Sir
labels: <Title>
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labels: Person:coreference:Person
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type: relation
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labels: Person:holds_title:Title
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type: relation
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labels: Person:holds_title:Title
from_id: 0