On another thread there was some mention of a Viking Kilt, whilst I have never encountered any suggestion that they wore such a garment, there is good evidence that some would wear a long-knee length tunic, without trousers.

To support this, some years ago in the Haithabu musem [Northern Germany-on the Baltic Coast], one of the clothing models wore a knee length belted tunic rather than trousers.

There again such a tunic was reasonably common male wear in Europe at that time.

So my guess, and it can only be a guess is that our ancestors wore the tunic-which in time evolved into the long shirt, and their cloak or wrap for bad weather in turn evolved into first the belted plaid and then the kilt as we know it today.

James