Cognomen Arai (アライ 
, Arai 
, Арай 
, and others...) , around the world, is a common surname. The cognomen Arai is habitual in Armenia, where it is quite a common surname, Japan, where it is quite a rare surname, and United Arab Emirates. Measured by absolute frequency, the name is most common in Japan, India, and Armenia. More prevalently, Arai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| アライ | Japan |
| Arai | Brazil, Indonesia, United States, India, Japan |
| Арай | Armenia, Kazakhstan, Ukraine, Russia, Azerbaijan |
| 新井 | China, Japan |
| Араи | Kazakhstan, Russia, Armenia |
Aira, Airyo, Aiyo, Aiyoshi, Aray, Araí, Araï, Ařij, Gharaï, Nii, Niii, Niiori, Niori, Sagara, Sarai, Sawara, Shini, Shinkyo, Shura, Sini, Sogara, Sohra, Sora, Soura, Souryo, Sōra, Àrij, Árij, Ârij, Ãrij, Ãŕij, Ārij, Аира, Акира, Араі, Араї, Нии, Ниии, Савара, Сагара, Сараи, אראי, আইরা, อะไร, อารยแสง, อาราอิ, อาไร, ไอร่, အရဲ, အြဲ, 新居, 相良, and Ａｒａｉ
| arai hakuga (b. 1715) |
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ryōsaku arai politician in Japan (b. 1879) |
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| kinta arai MX (b. 1878) |
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| yoneo arai American banker, US (b. 1889) |
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| shōri arai Japanese artist (b. 1895) |
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| sekiryū arai (b. 1889) |
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| isoji arai (b. 1894) |
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| tatsuo arai (b. 1904) |
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| alberto arai Mexican architect (1915-1959), MX (b. 1915) |
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| seiichirō arai (b. 1907) |
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| kyohō arai (b. 1913) |
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| gyokushū arai (b. 1914) |
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| hisao philip arai Canadian nematologist, CA (b. 1926) |
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| mary elizabeth needler arai Canadian zoologist and marine biologist, CA (b. 1932) |
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| shizue higaki arai person identified in the Museu da Pessoa collection, BR (b. 1936) |
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