An exception - usually on actual cars the personalized plate (popular in Germany, costs only 10,20€) is related to the owner, and on classic cars to the car.

Exceptions were Citroën XM, Chrysler PT Cruiser and the numberised Porsches (rarely so see a 911 without 911 on the plate).

My mother-in-law was irritated about the WES-DD 364 on my Durango: "Why that number? Ingo was not born in March 1964!"
She was told then, that the 364 stands for the hp