The Guinness Name

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History and Origins

The Mac Aonghusa sept — Guinness in anglicised form — traced their origin from the ancient personal name Aonghus, one of the most venerated names in Gaelic Ireland. Aonghus Óg (Young Angus) was among the most beloved deities of the Tuatha Dé Danann — the divine race of pre-Christian Irish mythology — associated with love, youth, poetry, and beauty. The name Aonghus was consequently given to sons across generations of Irish nobility and common people alike, and Mac Aonghusa families spread through multiple counties. County Down and adjacent areas of Ulster held one significant Mac Aonghusa concentration; Leinster, particularly the Kildare area, held another.

Richard Guinness and the Kildare Branch

The Guinness family that would found the brewery were from County Kildare — the Leinster branch of Mac Aonghusa. Richard Guinness (c.1690–1766) was the land steward and agent for the Archbishop of Cashel in Celbridge, County Kildare, and his son Arthur was born there in 1725. The family's anglicised name Guinness represents the standard phonetic rendering of Mac Aonghusa that was current in Leinster in the seventeenth and eighteenth centuries. The movement from Kildare to Dublin — where Arthur would establish his brewery — was a short step, but it changed the world.

Arthur Guinness and the St James's Gate Brewery

Arthur Guinness (1725–1803) signed a 9,000-year lease on a small brewery at St James's Gate in Dublin in 1759 — one of the most consequential lease-signings in commercial history. The brewery Arthur Guinness founded grew over the following two and a half centuries into one of the world's most recognised brands, making the Guinness name globally known in a way that few Irish surnames have achieved through commerce alone. Arthur Guinness was also a significant civic figure — a supporter of Catholic emancipation at a time when it required courage, a philanthropist, and a key figure in Dublin's commercial life. His descendants became one of the great Anglo-Irish dynasties, intermarrying with British aristocracy while maintaining their Irish identity.

The Guinness Dynasty

The Guinness family became one of the wealthiest families in the British Isles through the nineteenth century. They were elevated to the peerage — Benjamin Guinness became the first baronet in 1867, Edward Cecil Guinness became the first Earl of Iveagh in 1891. The family's philanthropy transformed Dublin: Benjamin Guinness funded the restoration of St Patrick's Cathedral in the 1860s; the Iveagh Trust built housing for Dublin's poor; the Iveagh Play Grounds and the Iveagh Baths were gifts to the city. The Guinness name became synonymous with both commercial success and civic generosity in Dublin.

The Diaspora

Unlike most Irish surnames, Guinness in the diaspora is dominated by the fame of the beer rather than by emigrant communities. However, Mac Aonghusa families did emigrate — primarily through the Famine and post-Famine emigrations — and the Guinness name appears in American, Australian, and British records as a surname carried by families of no direct connection to the brewery dynasty.

Alec Guinness (1914–2000), the English actor — one of the great performers of the twentieth century — bore a stage surname adopted from his mother's family. Born Alec Guinness de Cuffe, he used the Guinness name that connected him to his family's Irish heritage. His roles in Ealing comedies, in David Lean films, and as Obi-Wan Kenobi in Star Wars made the name Guinness internationally famous in acting as well as brewing. The humanitarian Bryan Guinness (2nd Baron Moyne, 1905–1992) was a significant literary figure and poet within the Anglo-Irish tradition.

Notable Guinness Families

• Arthur Guinness (1725–1803) — Founder of the Guinness Brewery at St James's Gate, Dublin, in 1759. Born in Celbridge, County Kildare, of Mac Aonghusa stock. His 9,000-year lease transformed a small Dublin brewery into one of the world's most recognised commercial brands.
• Benjamin Guinness (1798–1868) — Grandson of the founder, first baronet Guinness. He rebuilt St Patrick's Cathedral in Dublin at his own expense in the 1860s — one of the great acts of private architectural philanthropy in Irish history.
• Alec Guinness (1914–2000) — English actor of Irish family heritage, one of the great performers of the twentieth century. Known for Ealing comedies, Lawrence of Arabia, Bridge on the River Kwai (Academy Award, 1957), and Star Wars.
• Edward Cecil Guinness, 1st Earl of Iveagh (1847–1927) — Built the Guinness brewery into a global corporation and used the proceeds for vast Dublin and London philanthropy, including the Iveagh Trust housing estates and the Iveagh Bequest to Kenwood House in London.