Family name Hayes-Williams (Hayes-Williams 
) , in the world, is a very rare surname. The cognomen Hayes-Williams is habitual in Australia, where it is a very rare surname, New Zealand, and the United Kingdom, where it is an extremely rare surname. In absolute terms, this name is the most popular in Australia, the United States, and New Zealand. Parts of the name also exists independently as a last name Hayes, and a last name Williams.
| VARIANT | COUNTRY |
|---|---|
| Hayes-Williams | Australia, New Zealand, United Kingdom, United States |
| william gordon hayes-williams (1862-1934) registrar-general (b. 1862) |
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| charles ethersey hayes-williams (b. 1858) |
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| clive hayes-williams (b. 1884) |
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