Surname
- Ava Cadell (born 1956), American actress
- Francis Cadell (artist) (1883–1937), Scottish painter
- Francis Cadell (explorer) (1822–1879), Scottish-born explorer of Australia
- Jean Cadell (1884–1967), Scottish actress
- Meryn Cadell, Canadian singer
- Richard Cadell (born 1969), British magician and puppeteer
- Selina Cadell (born 1953), British actress
- Simon Cadell (1950–1996), British actor
- Thomas Cadell (1835–1919), Scottish recipient of the Victoria Cross
- Thomas Cadell (publisher) (1742–1802), English bookseller
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