1,848 O’Sullivans Make History in Castletownbere: Ireland’s Biggest Clan Gathering Ever
The O’Sullivan clan gathered 1,848 people in Castletownbere, County Cork on June 2, 2026, breaking the Guinness World Record for the largest same-surname gathering. Diaspora from Australia, New Zealand, Canada and the US joined the homecoming — and every week, 64,000 Ireland lovers get stories like this in their inbox.










