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- Samuel Ellis (disambiguation), includes Sam/Sammy/Samuel
- Sedrick Ellis (born 1985), American football player
- Seger Ellis (1904–1995), American jazz pianist
- Shaun Ellis (born 1977), American footballer
- Shaun Ellis English animal researcher
- Shirley Ellis (born 1941), American soul singer
- Simon Ellis, English graphic designer
- Sophie Ellis-Bextor (born 1979), British pop singer
- Steven Ellis (disambiguation), several people
- Susan Williams-Ellis (1918–2007), English potter designer
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