Complex sentence: It has no identifiable association with the Lewis Macleods, rather, it is originally a Dunvegan MacLeod tartan-the earliest published appearance of it was in the "Vestiarium Scoticum" in 1842.
Split into simpler sentences: It has no identifiable association with the Lewis Macleods though; it was originally associated with the Dunvegan family. The earliest published appearance of the tartan was in the "Vestiarium Scoticum" in 1842.