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Cognomen Smith-Irby (Smith-Irby ) , around the world, is an extremely rare last name. The surname Smith-Irby is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Smith, and a last name Irby.
| VARIANT | COUNTRY |
|---|---|
| Smith-Irby | United States |