“Descendants of Cruimín' (diminutive of crom, bent); the name of a well-known family in Cork, Kerry and Limerick; of West Cork origin, said to be a branch of the MacCarthys.” Rev. Patrick Woulfe, Irish Names and Surnames (1923) “O Cruimin, Cremin in English, is exclusively a west Munster surname; almost all the families so called are resident in Co. Kerry and Cork or have recently migrated therefrom, though in the 1659 census they were more numerous in the Co Limerick barony of Connelloe, which adjoins these two counties. The tradition is that they are a branch of the MacCarthys, and in that connection it is interesting to note that in the Bantry district Matheson found the name Cremin interchangeable with MacCarthy.” Dr. E. MacLysaght, More Irish Families (1960) Note: a clear distinction should be made between paternal line descendants of the Ó Cruimín sept of Muskerry and Duhallow, whose origins are believed to derive from the Ui Cormaic sept of the Ui Fidgheinte, and those of the cognatic sept of MacCarthy Cremin (“Mac inghen Crimen Carthy”, literally “son of the daughter of Ó Cruimín”), whose paternal origins are purported to stem from the pairing of a 14th century MacCarthy Reagh Prince of Carbery and an Ó Cruimín woman whose given name is lost to memory. This surname project is open to testers with any known or suspected Ó Cruimín surname variant who have tested a minimum of 37 markers (although 67 or 111 markers, or “Big Y” testing is strongly suggested), or have been identified through single SNP testing as CTS4466+, and whose terminal SNP is A88, Z16254, or one of their downstream branches. Qualified testers who are interested in joining the McCarthy Surname Study at Family Tree DNA may submit their requests here: https://www.familytreedna.com/groups/mccarthy-surname-study/about or visit the McCarthy DNA Scrapbook Pages at: http://freepages.genealogy.rootsweb.ancestry.com/~skibbgirl/McCarthyDNAProject/ SEE OUR REGIONAL PROJECT AT : http://www.worldfamilies.net/ The Ui Cormaic of Thomond regional project welcomes Y-DNA testers in the R-CTS4466 haplogroup who have tested a minimum of 37 markers (67 or 111 markers is strongly encouraged), and whose surname is known or believed to have originated from the Ui Cormaic, Ui Fearmaic, Ui Breacain, Ui Caisin, Corco MoDruadh, Corco Baiscin, or Dal Cais territories in counties Limerick and Clare. http://www.worldfamilies.net/surnames/ui_cormaic