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Surname Swilley (Swilley
) , globally, is quite a rare cognomen. The cognomen Swilley is habitual in the United States, where it is a rare surname, New Zealand, where it is a very rare surname, and Canada. Measured by absolute frequency, it is the most numerous in the United States, Canada, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Swilley | Canada, Mexico, New Zealand, United States, United Kingdom |