Neill

Neill is a surname and given name of Gaelic origin, usually derived from the Irish given name Niall and the English given name Neil. The form Neill is one of several spellings, alongside Neil, Neal, and Niall; the surname O'Neill is a related but distinct lineage. In Ireland and Scotland, Neill appears as both a surname and a given name and has spread to other English-speaking countries through migration.

Notable people with the surname Neill include Alexander Sutherland Neill (1883–1973), a Scottish educator and founder of Summerhill School. Neill as a given name is exemplified by Neill Blomkamp (born 1979), a Canadian film director, writer, and producer. The name is used across English-speaking countries and continues to appear in both historical and contemporary contexts.

Overall, Neill functions as a flexible name element within Gaelic-derived naming traditions, reflecting patterns of Anglicization and diaspora that have shaped its usage in Ireland, Scotland, and beyond.