Some of the Irish tartans are very old. The Ulster tartan, for instance, dates to c. 1600, but please note it was not used as a named tartan until the mid-twentieth century.

But the Irish County tartans that you are asking about were all designed by Polly Wittering of The House of Edgar around 1996.

I think, for the most part, they are quite beautiful in appearance (there are one or two I don't like, but for the most part, I love the colors).

You can see them all here:
http://giftshop.scottishtartans.org/Irish.htm

Or here (click on "Find a Tartan" and then "Ireland":
http://www.district-tartans.com/

Is there a name list anywhere? Yes. The House of Edgar has a name list available of most all common Irish surnames and what county or counties that name came from. I have it and use it in our gift shop at work (so I can check a name for you on Monday, if you like). Also, I use The Surnames of Ireland by William MacLysaught as a standard reference on the origins of Irish names. Again, I have that volume at work, so I would be glad to check a name for you on Monday.

Aye,
Matt