Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MAY
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
Probably given to a child born in that month. May, in the Saxon, is a daisy, a flower; the fifth month in the year, beginning with January. Gaelic, mai or maith, good, pleasant, fruitful; Mad, Welsh. From Ma we have mai, the earth, the producer; ma, mother, tender, kind.
Surname type: From given name or forename
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English