Bernays is a surname and may refer to:
- Isaac Bernays (1792 - 1849), a German rabbi, and father of:
- Jakob Bernays (1824 - 1881), a German classical linguist
- Michael Bernays (1834 - 1897), a German literature historian
- Martha Bernays (1861-1951), granddaughter of Isaac Bernays and wife of Sigmund Freud
- Paul Bernays (1888 - 1977), a Swiss mathematician born in London, a great-grandson of Isaac
- Edward Bernays (1891-1995), nephew of Sigmund Freud, great-grandson of Isaac Bernays and the "father of public relations"
- Anne Bernays (born 1930), daughter of Edward Bernays and American novelist
- Martha Bernays (1861-1951), granddaughter of Isaac Bernays and wife of Sigmund Freud
- Adolphus Bernays — Professor of German Language in London, brother of Isaac
- Lewis Adolphus Bernays (1831-1908), a public servant and agricultural writer in Australia (son of Adolphus and a nephew of Isaac Bernays)
- Robert Bernays (1902 - 1945) Liberal MP
- Frederick Bernays Wiener (1906–1996), American jurist
It may also refer to:
- Von Neumann-Bernays-Gödel set theory