Ah! You just struck a memory!

I've had some other discussions where it was brought up that Caldwells were perhaps Rievers, but you're right, and neither would have been part of the clan system during that time.

: The Caldwell's are Lowlanders so by definition are not
: part of the Clan system. Many important lowland
: families adopted their own tartans. tartans are
: recognised as part of scotish "togetherness"
: and I suppose it is nice to have a tartan to be
: associated with.
: The early Stewarts were granted great swathes of land in
: Renfrew and in Kyle (Ayrshire) - areas in which
: Caldwell's originated. The de Moreville family also
: are supposed to have been connected with early
: Caldwell's also. The de Morevilles passed through
: heiresses to Montgomery's eventually. So I agree that
: Stewart is a good choice from location and
: association. The Caldwell's did not seem to have as
: much association with the Montgomery family later on
: and for later times the More family is more likely.
: The More family have their own tartan. Other choices
: by location and association are: Cochrane and Wallace.
: Both families caome from the same area and seem to
: have Caldwell connections.