http://www.nytimes.com/2007/11/08/nyregion/08irish.html?ex=1352178000&en=56db4a3c5576c9cc&ei=5090&partner=rssuserland&emc=rss

Etymologies are often somewhat speculative, but if even half of these connections are genuine, that's interesting...especially to someone such as myself who has an unpronounceable Irish Gaelic string as a last name.