Surname Greig (Greig 
, สีเทา 
, Грейг 
) , around the world, is a common cognomen. The family name Greig is characteristic of New Zealand, where it is quite a rare surname, Australia, and the United Kingdom. In absolute terms, it is the most numerous in the United Kingdom, the United States, and Australia. Much less frequently, Greig is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Greig | United Kingdom, Canada, Australia, New Zealand, United States |
| สีเทา | Thailand |
| Грейг | Ukraine |
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samuel greig Scottish admiral (1736-1788), GB (b. 1736) |
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john greig American politician (1779-1858), US (b. 1779) |
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| john greig British mathematician (b. 1759) |
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| david greig politician, died 1866, GB (b. 1793) |
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| john greig author (19th century) (b. 1801) |
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| woronzow greig English barrister, GB (b. 1805) |
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| camilla eliza greig (1820-1908) (b. 1820) |
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| george m. greig Scottish watercolorist, circa 1820-1867, GB (b. 1820) |
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jane stocks greig Scottish-Australian medical doctor and public health specialist, GB (b. 1874) |
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janet greig Scottish-Australian anaesthetist, GB (b. 1874) |
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robert greig American/Australian actor (1879-1958), AU (b. 1879) |
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flos greig Australian lawyer (1880-1958), AU (b. 1880) |
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| james greig British banker (b. 1834) |
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| david greig wealthy gentleman farmer (b. 1837) |
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| selina greig (1838-1928) (b. 1838) |
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