What’s the MAC address of the device you are viewing this from? The IP Address? What’s your name? The easiest of all those to remember is your name, mine is PNC for short. PROFINET device names are used for the same reasons.
The number one rule-of-thumb, which you should never forget when commissioning a PROFINET system: make sure to assign the device name from your engineering tool (or setup auto commissioning). Here is the PROFINET Naming Convention list to help you out.