You used some letters from your car reg (providing its not a private plate!).
My car has AXZ in so I told my dc my name was Anaxzunamoon (as in from The Mummy though not actual spelling!) kids ( teens) pandered to my eccentricity when we went to Asda and they told customer service there were lost and their dm's name was Anaxzunamoon!
I ignored it and hid in amongst the clothes!!