Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
DAISY
As described in historical dictionaries
Patronymica Britannica (1860)
DAISY. Possibly from Vnn ancient barony of Aisie (D Aisie) in the arrondissement of Pont Audemer in Normandy — now written Aisier.