Nash is an English surname that arose from the phrase atten ash, "at the ash tree", and so means "ash tree" or "dweller by the ash". For many Americans it evokes Nashville and country music, and the mathematician John Nash of A Beautiful Mind is its best-known bearer. Nash has risen from number 920 in 2000 and number 345 in 2015 to a peak of number 233 in 2021 and ranks number 255 among boys' names in 2025.