Family name Roi (Roy 
, Roi , רועי 
, and others...) , around the globe, is a prevalent surname. The cognomen Roi is habitual in Bangladesh, where it is a common surname, India, and Israel (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in India, Bangladesh, and the United States. Very seldom, Roi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Roy, Roi | Philippines, Indonesia, United States, Bangladesh, India |
| רועי | Israel |
| รอย | Thailand |
| Рои | Ukraine, Russia |
Arroyo, Deray, Du Roi, King, Kingová, Koning, König, Lerwa, Norroy, Re, Rei, Rex, Rey, Roderigo, Rodrigo, Rouai, Roue, Roué, Roí, Roî, Roï, Roī, Roį, Ruderico, Rui, Ruot, Ròi, Ròì, Ròï, Rói, Róî, Rôi, Rôì, Rôí, Rôî, Rôï, Rôį, Rõi, Rõì, Rõí, Rõî, Rõï, Rõī, Rõį, Rēx, Rōí, Rōï, Rōī, Rőì, Rőî, Rơi, Rǿi, Rọi, Rỏi, Rối, Rồi, Rổi, Rỗi, Rội, Rới, Rời, Wa, Řoi, Řoî, Řôî, Řôï, Řõí, Řőî, Řőï, Кинг, Кёниг, Кінг, Рей, Родриго, Рой, Роі, Руй, Рэй, קינג, קניג, רודריגו, روا, رودريغو, روى, روي, ري, كينغ, کنگ, কিং, รอยด์, รอยส์, ร้อย, หร่อย, โรย, キング, ルイ, レ, レイ, ロイ, 瑞, 金, 雷, and 鲁伊
| isidre roi Spanisch composer, harpist, choirmaster of the Escolania de Montserrat and Benedictine from abbey of Montserrat, ES (b. 1655) |
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| august wilhelm balthasar du roi (b. 1744) |
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| joseph adrien le roi French librarian, FR (b. 1797) |
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| pietro roi Italian painter (1819-1896), IT (b. 1819) |
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| j. f. a. de le roi (b. 1835) |
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| giuseppe roi Italian politician (1863-1926), IT (b. 1863) |
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| otto le roi ornithologist, DE (b. 1878) |
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| wilhelm du roi DE (b. 1893) |
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| rudolf de le roi (b. 1894) |
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| antonio roi (1906-1960), IT (b. 1906) |
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corrado roi artist, IT (b. 1958) |
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| maria theresa roi (born 1922) (b. 1922) |
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lana roi musical artist, CA (b. 1987) |
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| michel roi (b. 1932) |
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| gérard roi French politician, FR (b. 1946) |
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