Thanks for the information and interest in my topic.
I have found another coat of arms for the MacLeod of Harris. That is far more striking than the mountain with flames for the Lewis. I think that will fit for my taste and the project. All in all it is just one unit of Gallowglass mercenaries in a scottish lowland army.
I like historical background for my projects though in the end it should look great on the table top.
We will see...