Underdown
Underdown is a surname. Notable people with the surname include:
- Charles Edward Underdown, English actor
- David Underdown, English historian
- Emanuel Maguire Underdown, English barrister, author and industrialist
- Emily Underdown, English author
- George Underdown, English cricketer
- Harry Charles Bailee Underdown, English barrister and industrialist
- James Underdown, executive director of The Center for Inquiry West in Los Angeles
- Thomas Underdown, English poet and translator