Cognomen Allein (ألين 
, Allein 
) , in the world, is quite a rare family name. The cognomen Allein is habitual in Libya, where it is a rare surname, Syria, and Saudi Arabia. In absolute terms, this name is the most popular in Brazil, Syria, and the United States. Also, Allein is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ألين | Iraq, Egypt, Sudan, Syria, Saudi Arabia |
| Allein | Tanzania, Philippines, France, Brazil, United States |
| regine allein holocaust victim, b. 1870-02-18, AT (b. 1870) |
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| robert allein (b. 1919) |
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allein maliksi Filipino basketball player, PH (b. 1987) |
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| allein plain researcher (ORCID 0000-0001-9841-9499) |
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