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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
The Gallagher Clan
What
1488 people
Where
Ireland (Letterkenny,)
When
09 September 2007
The world record for the largest same last name gathering involved 1,488 participants with the surname Gallagher at an event held in Letterkenny, Ireland on 9 September 2007.