Most popular family names

Family names can be unique or come in large numbers.
In different countries some names are the most popular.
Here is the listing :

• Germany
  • Müller
  • Schwarz

• Great Britain
  • Smith
  • Black

• Ireland (top ten[1])

1. Murphy
2. Kelly
3. O'Sullivan
4. Walsh
5. Smith
6. O'Brien
7. Byrne
8. Ryan
9. O'Connor
10. O'Neill

• Poland
  • Kowalski
  • Nowak

• France
  • Noir
  • Blanc

• Italy
  • ???
  • ???

• Russia
  • Tscherkasov
  • Dougorookiy

• Sweden
  • Johanson

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/Talk