A 20th-century coinage enjoying a certain vogue. Ostensibly it is from the district of south-west London, which became known as the hub of the Swinging Sixties. (It was named in Old English as the ‘chalk landing place’, cealc hӯð). It is also the name of several places in North America, the earliest of which, in Maryland, was named in 1739. It is the name of the daughter of former U.S. President Bill Clinton. Another influence on the coinage may have been the given name Kelsey.