Top 10 Irish surnames

Mike Collins emails a weekly “Letter from Ireland,” which is free. When people sign up for the letter, they’re asked to share the Irish surnames in their family tree. Based on the large database Collins has built over the last four years, these are the top ten most numerous Irish surnames, in reverse order: 

10. Collins

9. Murray

8. O’Connor

7. O’Brien

6. Ryan

5. McCarthy

4. Walsh (also Walshe/Welsh)

3. Sullivan

2. Kelly

1. Murphy

This week’s letter summarizes the origins of these names and where they are most commonly located.

Collins and his wife Carina also offer subscription membership in the Green Room, a service intended to “bring your Irish heritage and ancestry to life.”  You may be interested, especially with the special offer of 20% off through the end of January. Use the code GR2018 after selecting Green Room Annual Membership.

Read more about the benefits of Green Room Membership (including free access to at

Or just sign up to receive a Letter from Ireland every Sunday morning:

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