As A Surname
- Byron Janis (born 1928), American concert pianist. No relation to Conrad Janis.
- Conrad Janis (born 1928), American actor and jazz musician. No relation to Byron Janis.
- Elsie Janis (1889–1956), American musical theatre and vaudeville performer.
- Irving Janis, a social psychologist who pioneered the groupthink theory.
- Jaroslav Janiš, Czech auto racing driver.
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