Hazen is an English surname of uncertain origin, usually traced to the Old English hasu, "grey" or "ash-colored", and turned into a first name in the United States. It fits the current taste for short surname names such as Hayes and Hendrix, and sounds like a boy's twin to Hazel. Hazen has hovered between number 1850 and number 2500 for most of the past decade, reached number 1740 in 2024 and ranks 1782 in 2025.