Yes, the name Keohane is Irish and in books about Irish names is listed as "peculiar to West Cork". Our Carty or Cartie is my greatgreatgrandmother Cath Carty listed from time to time as Cath "Mountain". Who married a Michael Whooley (formerly pronounced as "Wellie" but now "Hooley" in Cork. They had children baptised in Kilcoe parish in West Cork in the 1820-30s. They lived in the townland of Lissaclarig. According to the Griffith's Valuation (English tax records from the 1850s) There was a Daniel Carty in the same townland. In such listings his name is follwed by "Mountain" in italics. The Cartys do not appear in the prior Tithe Listings (forced taxation to support the Protestant Church of Ireland in the 1820s) not do they appear in Lissaclarig in subsequent listings of Griffiths. In "Surnames of County Cork" by Tim Cadogan, under secondary surnames, he lists three McCarthy groupings as McCarthy Mor, Muskerry and Reagh branches. He states that "Mountain" usually referred to a Donovan or a McCarthy. The 1659 census for East Carberry lists 26 variations of O Carthy, Carthy Oge and Carthy, Thb book "Irish Fiants of the Tudor Sovereigns" lists the pardon in 1601 of Donnell O'Donovan of Castledonovan and his wife Joan nee Cartie, and includes West Cork references such as: a Donough m'Carthie of Killinleigh, a John and Donnel m'Tiege m'Cartie of Caheraghe, Fynine m'Donnell m'Cormack Cartie of Montyne, Donogh m'Donogh Cartie alias Donogh encowne and Cormack m'Donnell m'Cormack Carty of the same and Tiege m'Donogh m'Tiege Cartie of the Montyne. I have left the spellings as they appeared in the records. "Clans and Families of Ireland" by John Graham describes the name as coming from the Irish MacCartaigh or carthach meaning "loving" and the origianl Carthach was said to be a king of Cashel c. 1040. About the 12th century the MacCarthys were driven from Tipperary by the O'Briens and moved into Cork and Kerry. He lists four main branches, MacCarthy Mor who ruled south Kerry, the Duhallow MacCarthys of Northwest Cork, MacCarthy Riabhach ('grey') of Carbery in West Cork and MacCarthy Muskerry on the Cork/Kerry border. Aren't you glad you asked? Happy New Year.