The name Chelsy is a modern English variant of the name Chelsea, which originated as a place name in England. The name Chelsea derives from the Old English words "ceales" meaning "chalk" and "ey" meaning "island". It initially referred to a chalk-rich area along the River Thames in London.

The earliest recorded use of the name Chelsea dates back to the late 11th century, when it appeared in the Domesday Book of 1086 as "Chelcheie" and "Chelched". This suggests that the name was already in use as a place name before the Norman Conquest of England in 1066.

While the name Chelsea has been used as a given name for centuries, the variant spelling Chelsy is a relatively modern invention, likely emerging in the late 20th century. It is believed to have been derived from the name Chelsea as a more unique and stylized spelling.

There are few notable historical figures with the name Chelsy itself, as it is a relatively new variant. However, some notable individuals named Chelsea include:

1. Chelsea Clinton (born 1980), the daughter of former U.S. President Bill Clinton and former Secretary of State Hillary Clinton.
2. Chelsea Handler (born 1975), an American comedian, actress, and television host.
3. Chelsea Wolfe (born 1983), an American singer-songwriter and musician.
4. Chelsea Lately (born 1985), an American professional wrestler.
5. Chelsea Cooley (born 1981), an American model and television personality.

While the name Chelsy is a modern variant, its roots can be traced back to the Old English origins of the place name Chelsea, which was derived from the chalk-rich location along the River Thames in London. It has evolved from a place name to a personal name over the centuries, with the variant spelling Chelsy emerging as a more unique and stylized version in recent times.