Transactions of the Iona Club
See Meaning and Probable Origin of the Name
In a Gaelic MS. of 1450, containing genealogies of several Highland families, and published with an English translation in The Transactions of the Iona Club, an ancestor of the Macleans is also mentioned as Gilleoin, son of Macrath (Gilleain me Icrait). This helps to confirm the tradition mentioned below, that the Macraes, Mackenzies, and Macleans were of the same ancestry, but it is not easy to make anything satisfactory out of those old genealogies.