Alistair Moffat has an interesting little book, published by Thames & Hudson, titled The Highland Clans. A nice historical summary, and then a listing of the various clans with some notes on each. The MacEwan notes give a good chuckle. Some things don’t change across the centuries — they must be genetic ? !
Settled around Loch Fyne, the clan has a name-father in the early 12th century. By 1602 they were listed as a broken clan, living outside the law, and the Campbells were made responsible for their good behaviour. They failed.