The name Lennox (earlier Levenax) is a pluralised form of the Gaelic word Leamhnach, denoting a Lennox man, and ultimately derives from Leamhain, the Gaelic name for the River Leven.[1]
Under local government reforms in the mid-19th century, the province of Lennox was re-structured as the County of Dunbartonshire, when the north-eastern shore of Loch Lomond was transferred to Stirlingshire.