I remember reading that during the French and Indian Wars, the Indians of the Iroquois Confederacy regarded the soldiers of the Black Watch as 'distant cousins' - probably because the Gaelic culture has many common 'markers' with theirs.

I have a Sikh customer who is considering a kilt in the Singh tartan!

..and remember that 'mutts' are the most robust bloodlines! (Someone once described the 'pureblood' Habsburgs as 'a pack of stuttering bleeders'!