Cognomen Clwyd (Clwyd 
) , in all the world, is a very rare last name. The family name Clwyd is habitual in Northern Europe, particularly the United Kingdom, where it is a very rare surname. More prevalently, Clwyd is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Clwyd | United Kingdom, South Africa |
|
ann clwyd Welsh politician and MP (born 1937), GB (b. 1937) |
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| hafina clwyd Welsh author, columnist and feminist, GB (b. 1936) |
|
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| einudd ap morien of dyffryn clwyd |
|
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| elizabeth clwyd |
|
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| edward clwyd, of orleston |
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