Släkthistoria för Dayus
Dayus Vad efternamn betyder
from the personal name Deiws a pet form of Dai Dafydd for which see David. In English counties bordering Wales Dayus and Dyos were sometimes reduced to Day(e)s and Deyes or altered to Dayhouse and Dyhouse through false association with the words deyhouse dayhouse ‘dairy’ or deyehouse dyehouse ‘dye-works’. There is no medieval evidence that this name derived from either word. Dayhouse has become extinct.
Källa: The Oxford Dictionary of Family Names in Britain and Ireland, 2016
