Hello and From The Great State of Missouri, I have ancestors who swore an allegance to the Campbells of Breadalbane.
Here's a quote from the Clan Campbell Society I found interesting concerning the Campbell of Argyll tartan.

"While it is true that the Sixth Duke [of Argyll] introduced a white line to his plain Campbell tartan to differentiate himself from the rest of the Campbells, (he being the chief and entitled to do so), he was the only member of the family so to do and the rest of the family thought he was rather pompous to do it."