Ó Caoimh is an Irish Gaelic surname most commonly Anglicized as O'Keefe or simplified to Keefe. The name derives from the term caomh, meaning "dear, beloved, gentle" in Irish, and the prefix Ó indicating "descendant of." Thus, Ó Caoimh denotes a descendant of a person named Caomh. Etymology The root of Ó Caoimh is the Irish word caomh, which carries connotations of kindness, gentleness, and nobility. This element appears in many old Irish names, reflecting the cultural value placed on amiable traits. The Ó prefix is a patronymic marker, distinctive of Irish surnames that emerged around the 11th century. The reformed spelling Ó Cuív is also used, and the feminine form is Ní Chaoimh. History Historically, the Ó Caoimh family belonged to the Eóganacht Glendamnach sept, a branch of the Eóganachta dynasty that ruled Munster from the 6th to the 8th centuries. The original Caomh, from whom the clan claims descent, lived in the early 11th century, and his lineage traces back to Cathal mac Finguine, a celebrated King of Munster who reigned in the early 700s and was a dominant figure among Irish kings. Over time, the Ó Caoimh sept became prominent in what is now County Cork, especially in the regions of Fermoy and Duhallow. Geographic Distribution Today, the surname and its anglicized variants are found mostly in Ireland, particularly in the southwest, as well as notably in the United States, the United Kingdom, and other English-speaking countries due to Irish emigration. The name maintained a strong presence in County Cork, where many genealogical records refer to the O'Keeffe family as a principal sept of the area. Cultural Significance and Notable Bearers One of the best-known bearers of the anglicized surname is Georgia O'Keeffe, the celebrated American modernist painter, though she was not of Irish origin. In Irish history, many O'Keeffe men served as soldiers, poets, and clerics, contributing to the local culture and identity. The clan's motto is often adopted as "No weapon shall harm O'Keeffe who uses his wits well," reflecting a legacy of cunning and influence. Meaning: Descendant of Caomh (kind, gentle, noble) Origin: Irish Gaelic Type: Surname Usage Regions: Ireland (mainly County Cork), diaspora in English-speaking countries