Cognomen Llewllyn (Llewllyn 
) , across the world, is a very rare family name. The family name Llewllyn is characteristic of the United Kingdom, where it is a very rare surname, Canada, where it is an extremely rare surname, and the United States. Likewise, Llewllyn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Llewllyn | United Kingdom, South Africa, United States, India, Canada |
| arthur llewllyn Peerage person ID=447944 |
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| mary llewllyn (died 1932) |
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