Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
NEILL
As described in historical dictionaries
Patronymica Britannica (1860)
MAC NEILL. The house of Macnelll or clan Neill is one of the most ancient of the Western Highlands. Their chiefs, theM.'s of Bara, ranked amongst the ' Principeslnsularum,' who formed the council of state of the Lord of the Isles. They were divided into the two great branches, Macnelll of Gigha, and Macnelll of Barra, the former settled in the south of Arg3deshire, and the latter in Inverness-shire, places so remote from each other that they became practically two distinct clans. B.L.G.
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic