A
- Abe Ellis (Stargate), a fictional character in the TV series Stargate Atlantis
- Albert Ellis (1913–2007), American cognitive-behavioural therapist and psychologist
- Albert Fuller Ellis (1869–1951), Australian prospector
- Alexander John Ellis (1814–1890), English philologist and music theorist, inventor of the cents' system in music intervals
- Alton Ellis (1938–2008), Jamaican musician
- Andrew Ellis (disambiguation), several people
- Annette Ellis (born 1946), Australian politician
- Arthur Ellis (disambiguation), several people
- Atom Ellis (born 1966), American musician
- Aunjanue Ellis (born 1969), American actress
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