Question in mind

[David Dalglish]

If you wish to wear a kilt, by all means do so, but always respect any tartan you wear, & wear it with pride.

[M. A. C. Newsome]

I always tell people, you don't have to have Scottish blood to wear a kilt, just a Scottish heart. :-)

About the 14th century, those who have commented are correct -- this is a couple of hundred years before the kilt. The earliest documentation we have of any form of the kilt is from 1594. See:
http://albanach.org/kilt.html

And for a brief outline of the history of the development of the kilt:
http://albanach.org/generations.html