Traditional Scottish dress apparently wasn't

From a review of a book by Hugh Trevor-Roper:

The third myth is that of traditional Scots dress, which Trevor-Roper shows to have been got up, largely for commercial purposes, in the 19th century.

The kilt was devised by a Lancashire industrialist as a convenient form of dress for his Scottish employees; while the clan-based differentiation of the tartans was the invention of two brothers calling themselves the Sobieski Stuarts, who in 1842 published their Vestiarium Scoticum, an elaborate work of imagination which served as a pattern-book for tartan manufacturers.