erc-nick

erc-nick is a variable defined in `erc.el'.
Its value is

nil

Documentation:
Nickname to use if one is not provided.

This can be either a string, or a list of strings.
In the latter case, if the first nick in the list is already in use,
other nicks are tried in the list order.

See function `erc-compute-nick' for more details on connection
parameters and authentication.

You can customize this variable.