Phillabeg, Feilidh-beag, or "Little Kilt"

[Woodsheal]

Consider also this article. The thinking is, that since the belted plaid ("great kilt") most likely had a drawstring to facilitate its use, so too did the earliest philabegs have a drawstring in the waist:

http://www.tartansauthority.com/Web/...eltedplaid.asp

Here's an image from ca. 1780 which shows no careful pleating as we now know it, and apparently not much of an overlap of the "aprons":

http://www.marariley.net/celtic/images/stockings.JPG