Okay, so I still have to do some more research on the lineage aspect of it (Honeychile, if you want to help with that one I'd be happy to accept!
), but my 4xGreat-grandmother's maiden name is Sinclair so I am only assuming someone from that line is from Scotland! If so, here is a link to the tartans (can't figure out how to do the picture thing!)
Sinclair tartans
Sarah