Last name Allenson (Allenson 
) , across the world, is a rare family name. The cognomen Allenson is habitual in the United States, where it is a very rare surname, the United Kingdom, and New Zealand. Measured by absolute frequency, it is commonest in the United States, the United Kingdom, and Canada. Very seldom, Allenson is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Allenson | Canada, Philippines, United Kingdom, United States, India |
| john allenson theologian (b. 1558) |
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gary allenson baseball player, US (b. 1955) |
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