Wrong name display in outgoing Email

Wrong name display in outgoing Email

Hi,
I have just setup my domain, when I registerd I used my Gmail account,
Now in all of my outgonig email from my domain the other side that recived the mail get my email with the good address:
itzik@mydomain.com but with a the name of my gmail account ( not the domain gmail the name of the account)
somthing like this:
itzik@mydomain.com ("itzik levi" <-- this is the name in my gmail)
I try to find an alias in my accound and didn't find any.
Can you please help me to fix it.
I want people to see: Itzik@mydomain.com.

Thanks