Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
DALZIEL
As described in historical dictionaries
Patronymica Britannica (1860)
DALZIEL. DAIZELL. Anciently written Dallyell, Daleel, Dalyiel, &c. From the barony of Dal-ycel (i.e. ' the beautiful meadow') on the river Clyde. The Earls of Carnwath are the chiefs of the family. The often-quoted romantic story which assigns another origin for the name (See Eng. Surn. ii. 8.) has neither history, etymology, nor common sense to support it.
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic