Throughout the world, Mcnelly (Mcnelly 
) is an extremely rare gender-neutral first name. Much more frequently, Mcnelly is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mcnelly | Canada, Australia, New Zealand, United States, United Kingdom |
| willis e. mcnelly American writer (1920-2003), US (b. 1920) |
|