Based on MS 1467 and a series of charters associated with Beauly Priory, it has been suggested that the Mackenzies and Mathesons were junior branches of the Del Ard family, heirs to Gilleoin of the Aird.
1411.  W oparciu o MS 1467 i serię czarterów związanych z Beauly Priory, zasugerowano, że Mackenzies i Mathesons były młodszymi gałęziami rodziny Del Ard, spadkobiercami Gilleoin of the Aird.