Its source is cealc hyth, an Old English name meaning "Chalk port."
The name Chelsey ranked 574th in popularity for females of all ages in a sample of 2000-2003 Social Security Administration statistics and 1016th in popularity for females of all ages in a sample of the 1990 US Census.
This name first made its appearance on state popularity lists before 1993, but is becoming less commonly used. In some cases, it has fallen off the lists altogether.
This was a place name, either for a landing characterized by chalk deposits or for a port where chalk shipments were received.