Surname Rei (Rey 
, Rei 
, レイ , and others...) , throughout the world, is a widespread family name. The cognomen Rei is characteristic of Monaco, where it is a common surname, Uruguay, where it is quite a common surname, and Mauritius (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Colombia, Japan, and France. Likewise, Rei is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rey | Colombia, Philippines, France, Argentina, Mexico |
| Rei | Colombia, Philippines, France, Mexico, Japan |
| レイ | Japan |
| ريه | Iraq, Jordan, Egypt, Palestinian Territory, Saudi Arabia |
| Рей | Kazakhstan, Russia, Ukraine, Kyrgyzstan |
| Реи | Russia |
| Рэй | Kazakhstan, Russia, Kyrgyzstan |
Deray, King, Kingová, Koning, König, Monterey, Monterrey, Raie, Re, Real, Ree, Reig, Rets, Rex, Reì, Reí, Reî, Reï, Riga, Roi, Roie, Roy, Rui, Rèï, Réi, Réis, Réï, Rêi, Rëi, Rëî, Rëï, Rēx, Ręï, Rẻi, Ρέι, Кинг, Кёниг, Кінг, קינג, קניג, رى, ري, كينغ, کنگ, কিং, รี, เรอิ, រ៉ី, キング, レ, ロイ, ㄦㄟ, 儿诶, 瑞, 金, 雷, and 雷伊
| francesc rei (b. 1750) |
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| peder hansen rei (b. 1812) |
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august rei Estonian politician (1886-1963), EE (b. 1886) |
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| therese rei Estonian singer, EE (b. 1891) |
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pepe rei Spanish journalist and writer (1947-2021), ES (b. 1947) |
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| aleksander rei Estonian politician, EE (b. 1900) |
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francisco fernández rei Spanish philologist, ES (b. 1952) |
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xosé ramón brea rei Spanish writer, ES (b. 1955) |
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| ferdinand rei (b. 1896) |
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tony rei Austrian illusionist, AT (b. 1957) |
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| joão de cristo rei (b. 1900) |
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| daniel de molins de rei (b. 1901) |
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anxo rei ES (b. 1957) |
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marina rei Italian singer, IT (b. 1969) |
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luís rei ES (b. 1960) |
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