The term 'Nervous One' can be solved by two different crossword solutions: NELLIE (6 letters) and NELLY (5 letters). Nellie and NELLY are both diminutives of the name Eleanor, which is derived from the Greek name Helenē, meaning 'LIGHT'. The name Eleanor has been used in English since the 12th century and has been popular in the United States since the 19th century. Nellie and NELLY are both commonly used as nicknames for Eleanor, and can also be used as independent given names.