Last name Eighteen (Eighteen 
) , throughout the world, is a rare surname. The cognomen Eighteen is habitual in the United Kingdom, where it is a rare surname, Switzerland, where it is a very rare surname, and Australia. In absolute terms, it most frequently occurs in the United Kingdom, Indonesia, and Australia. Likewise, Eighteen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eighteen | Belgium, Spain, Indonesia, United Kingdom, South Africa |
| robert eighteen-bisang Canadian writer, CA (b. 1900) |
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| john eighteen (b. 1927) |
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