Last name Demetriadi (Demetriadi 
) , globally, is a very rare cognomen. The cognomen Demetriadi is habitual in Cyprus, where it is quite a rare surname, Greece, where it is a very rare surname, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Demetriadi | Cyprus, United States, United Kingdom, Greece |
| michael anthony demetriadi (1920-2006) (b. 1920) |
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| philippa nancy demetriadi (born 1949) (b. 1949) |
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| peter michael demetriadi (born 1953), GB (b. 1953) |
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| antonia claire demetriadi (born 1959) (b. 1959) |
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| george demetriadi (died 1991) |
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| george constantine demetriadi Peerage person ID=17835 |
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| julian c. demetriadi historian, GB |
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| jennifer ann nancy erskine demetriadi (born 1982) (b. 1982) |
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| guy peter michael erskine demetriadi (born 1983) (b. 1983) |
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| james paul christian erskine demetriadi (born 1985) (b. 1985) |
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