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Largest gathering of people with the same surname

Largest gathering of people with the same surname
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Who
O Sullivan Clan, Beara Tourism
What
1,848 people
Where
Ireland (Castletownbnere)
When
30 May 2026

The largest gathering of people with the same surname is 1,848 and was achieved by Beara Tourism and the O Sullivan Clan (both Ireland), with the surname O Sullivan and Sullivan, at Beara Community School in Castletownbere, County Cork, Ireland, on 30 May 2026.

The aim of the event was to bring together families, relatives, and friends from near and far to celebrate heritage, connection, and community spirit. The Sullivans, the O Sullivans and Ó Súilleabháins mostly came from local areas but there were a number from USA, Canada, Mexico and UK. Photo IDs were checked and all the participants had to be gathered and one area for at least 5 minutes.