Around the globe, Irby (Irby 
, Ирби 
) is a rare principally boy's, but very infrequently girly first name. The first name Irby is characteristic of the United States, where it is a rare predominantly masculine, but very seldom feminine name, Mexico, where it is an extremely rare mostly boy's, but uncommonly feminine name, and China, where it is an extremely rare masculine name. More frequently, Irby is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Irby | United Kingdom, Afghanistan, Australia, United States, Canada |
| Ирби | Russia |
| montagu henry john irby (1828-1893) (b. 1828) |
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| rowland john irby (born 1863) (b. 1863) |
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| lewis michael aubert irby (1882-1974) (b. 1882) |
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| greville irby peer (1889-1958), GB (b. 1889) |
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| ross james irby (born 1959) (b. 1959) |
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| lee irby American writer, US (b. 1969) |
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| giles irby Peerage person ID=321457 |
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| sir john irby Peerage person ID=709143 |
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| sherman irby American musician, US (b. 1986) |
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| linna irby (b. 1998) |
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