United States explorer who mapped much of the American west and Northwest (1813-1890)
"John Fremont was a pioneering United States explorer who mapped much of the American West and Northwest."
A surname, from French., anglicisation of Frémont
"The Fremont family traces their name to an early American explorer whose original French spelling was later anglicized."
The place name Fremont is borrowed directly from French and is typically used to honor the American explorer John C. Frémont. Although his original surname was spelled without a final 't', this letter was added over time before the name traveled into English usage for locations named after him.