Fox is an English animal name that simply means "fox", from the Old English fox; as a surname it was given to someone thought to be as clever or red-haired as the animal. The name is best known from FBI agent Fox Mulder in The X-Files, and the show's 2016 revival coincided with the name's best year. In the United States Fox entered the top 1000 in 2016, peaked at number 744 that year, dropped back out in 2022 and stands at number 1411 in 2025.