Plantagenet Ancestry @ Flavius was the given name, Afranius was the family name, and
Syagrius was a cognomen meaning "wild boar" (Moriarty, 1956).
The cited information was published by 1956 (Ref: Flavius was the given name, Afranius was the family name, and
Syagrius was a cognomen meaning "wild boar" (Moriarty, 1956).) The author/originator was Moriarty.
Source Notes
ABBR Plantagenet Ancestry, Moriarty