Ó hÉideáin is an Irish surname meaning "descendant of Éideán". The personal name Éideán is a diminutive derived from éideadh, the Irish word for "clothes" or "armour". This etymology suggests a possible occupational or descriptive origin, perhaps referring to a maker or wearer of garments or armor.The surname is most concentrated in its native Ireland. Due to migration during the Great Famine and subsequent periods, bearers may also be found in the United Kingdom, the United States, and other English-speaking countries. Over time, the name has often been anglicized as Hayden, a form that is more easily pronounced in English while obscuring the original phonetic structure. The anglicized version Hayden is far more common globally, while the original Irish form Ó hÉideáin is rarer and typically indicates a strong connection to Irish heritage.Key FactsMeaning: descendant of ÉideánOrigin: Irish GaelicType: Patronymic surnameUsage regions: Ireland, with diaspora in UK, US, Canada, Australia