How can i get My parent user name while i am on remotely logged on other server.

Hi
please suggest .. how can i get my original user from which logged in to another server.

my main current login is

[root@server1 nitin]$whoami
nitin
[root@server1 nitin]
[root@server1 nitin] ssh nit01@n01

i m going (redirected)to log in below path..

nit01@n01:/home/n01 -> pwd
/home/n01
nit01@n01:/home/n01 -> 

on this server i want get my parent user name i.e. (nitin)

Please help me out.

Thanks in Advance
Nitin

I think not possible!