Cognomen Tillyer (Tillyer 
) , in the entire world, is a rare surname. The surname Tillyer is habitual in the United Kingdom, where it is a rare surname, Australia, and Canada, where it is a very rare surname. In absolute terms, it is the most numerous in the United Kingdom, the United States, and Australia.
| VARIANT | COUNTRY |
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| Tillyer | Australia, Germany, Canada, United Kingdom, United States |
| edgar d. tillyer scientist and inventor (1881-1970), US (b. 1881) |
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| william tillyer (1938 - ) English artist, GB (b. 1938) |
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| richard d tillyer researcher (ORCID 0000-0003-2553-1361) |
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