Other County Clare-associated surnames:
1. Foudy (O Fouda)- This name thought to be derived from "fuadach" which means plundering. Originally a Mayo name, it is now very common in Clare. Sometimes it can be "translated" as Swift or Speed, both of which you would need if you went aplundering!
2. Creagh - An adjectival surname from the word "craobh" which means branch, from the practice of this clan carrying a green branch into battle when fighting the Danes in Limerick.
3. McMahon - A very old name which comes from the O'Brien family, Mahon having been the grandson of Brian Boru, the High King of Ireland and self-styled Emperor of the Irish.
The Thomond branch of the family can trace its origin back to the foundation of Ennis and the Ennis Friary, founded by the O'Briens in the thirteenth century.
McMahon means "son of a bear," and McMahon is the most numerous surname in Clare at this time. The McMahon's patrimony was Corca Baisceann comprising the baronies of Moyarta and Clonderlaw in the SW of Co. Clare. Ironically, the last chief of the name was accidentally killed at Bearhaven in 1602. Marshal McMahon, Duke of Magenta and President of the French Republic from 1873 to 1879 was from this clan.
4. Daly - (O Dalaigh), a very old sept who had a bardic school in Finvarra on the shores of Galway Baay. There is a memorial to the O Dalaigh school on the site. This clan was always associated with the O'Loughlins of the Burren. Some members of the family were poets to the powerful O'Brien clan.
5. Griffey - (O Griobhtha) - This proud name means "descendant of Griobta" (griffin-like), a fierce warrior. The name of a Dalcassian (Clareman) family who were chiefs of Cinal Cullachta in the SE barony of Inchiquin with their castle at Ballygriffey not far from Ennis. This name is still common in this area but in other places it has become anglicised as Griffin which was originally a Welsh name.
6. Keane - (Kane, McKeane, McCahan). A family of West Clare people who were coarbs of St. Senan of Scattery Island, per "Irish Roots" genealogy periodical. (I don't know what a coarb is, sorry, do you?) In Munster Province this name is associated with the Christian name Cian and the name Marcus is also associated with this family.