Cognomen Vychan (Vaughan 
, Vychan 
) , in the entire world, is a common surname. The family name Vychan is characteristic of Barbados, where it is quite a common surname, British Virgin Islands, and Ireland (explore the name in all countries). Measured by absolute frequency, it is the most numerous in the United States, the United Kingdom, and Australia. Very seldom, Vychan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vaughan | Australia, Ireland, Canada, United States, United Kingdom |
| Vychan | South Africa, United States, Canada |
| gruffudd vychan Welsh knight (b. 1390) |
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| gwenlian ferch ednyfed vychan Peerage person ID=595485 |
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| j.l. vychan artist, active in England in 1874-1893, GB |
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| gwladus ferch bleddyn vychan Peerage person ID=595497 |
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