The first McNeil of this family about whom there is good documentary evidence is Torquil (died c. 1380) who was Constable of Sweyn Castle which was an appendage of the Scottish Crown at Knapdale in North Cantyre. He was also Chief of the Clan Neill of Taynish in Cantyre and Gigha.
One of Torquils' indirect descendants (8th in descent) was Lachian of Tirfergus
of Tirfergus
is the ancestor of the McNeills of Cushendun and Ballycastle.
He was married twice; first to
He had 8 sons and 3 daughters of whom at least 4 sons settled in the North of Ireland and 3 are mentioned as having fought in the Williamite Wars.
One of Lachlan's sons was.
Torquil's next elder brother was Neill Bui of Killoquin in Co. Antrim and Machrihanish in Argyll.