The surname Guinness is of Irish origin, derived from the ancient Celtic name MagAonghusa, meaning "the son of the chosen one. " The name was popularized in Ireland and later spread to English-speaking countries like Canada, and Australia due to mass emigration following the Great Famine. Over time, the name evolved from its Gaelic form to more English-friendly versions like McGuinness and Magennis. The Guinness name is significant because it has become synonymous with the famous Irish stout, brewed by the Guinness Brewery since the 18th century. The name has also been associated with several notable individuals who have made significant contributions in various fields.
