What is nelly short for?

"Nelly" is short for the name "Cornelia." It is a popular nickname or shortened form of the name in English-speaking countries. "Nellie" is another common variation of the name. Cornelia is a Latin name meaning "horn" or "war horn." It has been used as a given name in Europe since ancient times. Notable people named Nelly include American rapper and singer Nelly, British actress Nelly McClung, and American golfer Nelly Korda.