I was interested in this idea so i checked some stuff out. The Clan Ker or Kerr (deriviations Kar, Car) was a really high standing clan, why isn't it on the list. It was on the border of Scotland and England and repelled the english time and time again. They became very powerful and were at points considered 'one of the crown's fists' type clan. Many and many of the members of the clan were put it to high powers of authority of regions by the crown. Their well known castle is 'Ferniehirst Castle'.
The name Kerr means 'left-handed men'.
just thought I'd add that one. more to come if you want.