Native American/First Nations tartans?

[Bigkahuna]

"Many of the tribes of the Eastern woodlands wore a kilt like garment."

I'm going to disagree with that one!

Eastern woodland men usually wore a basic breechcloth held up by a belt. On the legs (given the inclination) would be worn leggings of wool or leather (like biker chaps but not with an integral waistband like modern biker chaps). The leggings would be tied to the belt (breechcloth belt) with ties.

Independent of the leggings and breechcloth (and worn in a manner that MAY give an illusion of kilt-like garment) would be a traditional long shirt (might be referred to as a "hunting shirt" or something like that. It would (just like the "sarks" worn by the scots during that period) be a long shirt that hung down to the lower thighs or just above the knee. It would often be belted or sashed around the waist giving the appearance of a "skirted" garment, when it (in reality) was just a long shirt. For more protection and heavier "shirt" or jacket would be worn over that and belted around the waist as the shirt was.

But they were not "kilts" and they were not pleated. Here's some pictures:

A 1920s Seminole long shirt:
C:\Documents and Settings\Jim Husky\My Documents\My Pictures\New Folder (2)\Seminole-garb_thumb.jpg

A long shirt attributed to Osceola:
C:\Documents and Settings\Jim Husky\My Documents\My Pictures\New Folder (2)\Seminole-garb_thumb.jpg

An image of Billy Bowles:
C:\Documents and Settings\Jim Husky\My Documents\My Pictures\New Folder (2)\seminole shirt billy bowlegsdtc_5_tif.jpg

And finally one of "Powell" or Osceola, himself:
C:\Documents and Settings\Jim Husky\My Documents\My Pictures\New Folder (2)\Seminole Osceola_Kenney_and_Hall.jpg

Notice in this one above, Osceola appears to be wearing a shorter length legging garter-tied just below the knee (though the leggings that tied from the hip were also used with (again, a matter of style) garters tied just below the knee and above the calf. Pat Wickman, in her work on Osceola, discovered that he liked to wear two pair of garters and by micro-inspection of the fibers and analysis of the knots he used to tie them discovered he was a very slight man. Quite the flashy dresser, however.

Still, no kilt!

Jim aka kiltiemon

First of all, I never said they wore it all the time. The breechclout was by far the most common form of dress. As to the examples you site, they are all Muskogee. They are not really considered Eastern Woodlands Peoples. The Iroquois, Hurons, Delawares and Cherokees all had an unbifurcated garment very much like the kilt. This is not a hunting shirt with a sash around the waist, but an actual kilt-like garment.