Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
BEVAN
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Welsh.) A contraction of Ap Evan, or Ivan, the son of John; from ap, son, or literally from, and Ivan, John. So Brice, from Ap Rice; Pritchard, from Ap Richard, etc.
Surname type: From name of parent
Origin: Celtic
Region of origin: British Isles
Country of origin: Wales
Religion of origin: Christian
Language of origin: Welsh