Underdown

Underdown is a surname. Notable people with the surname include:

• Charles Edward Underdown (Edward Underdown) (1908–1989), English actor
• David Underdown (1925–2009), English historian
• Emanuel Maguire Underdown (1831–1913), English barrister, author and industrialist
• Emily Underdown (1863–1947), English author
• George Underdown (1859–1895), English cricketer
• Harry Charles Bailee Underdown (1877–1963), English barrister and industrialist
• James Underdown (born 1960), executive director of The Center for Inquiry (CFI) West in Los Angeles
• Thomas Underdown (16th century), English poet and translator