Who am I?

My machine has started, seemingly at random to vary between calling me:

stephen@SPPC or
I have not tinkered recently with any deep-level config files (honest!)…
Today I am @linux-ocq9, yesterday @SPPC.

Why could it be doing this?

Disable “change hostname via DHCP” in yast -> network devices -> network settings

Thank-you Mr Chips!

My conclusion is: You are stephen.
Question is probable: Where am I?

Formulating precise is at the basics of any conversation about computers rotfl!