Dictionary of Medieval Names
from European Sources

Agina f. Old French agin lengthened from Proto-Germanic *agio 'blade'.

France
Latin
c823 Agena (nom) irminon-vol2 51, Agina (nom) ibid. 33, CE
Cite as: S.L. Uckelman. "Agina". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Agina.