Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
EAGER
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
Sharp-set, vehement, earnest. The name may be local, from the river Eger, in Bohemia, or Egra, a city on the river Eger.
Patronymica Britannica (1860)
EAGER. EAGAR. A trait of character ; or, perhaps, a corruption of Edgar (spelt in A-Sax. Eadgar) by the suppression of the letter D.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Occupational name
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English