Yeah this is extremely common, surnames are probably the single most important thing in Germany when it comes to finding quality housing. Actually the housing

Yeah this is extremely common, surnames are probably the single most important thing in Germany when it comes to finding quality housing. Actually the housing market in Germany is really bad, somehow seemingly even worse than the British one, albeit in different ways. All the Germans I know live really well, because finding somewhere to live is more about connections ("Vitamin B", Genossenschaft, friend/colleague "giving" you their contract/flat) and being German (so you're not filtered based on your surname) than anything else. Of course, if you're an immigrant then you're unlikely to have connections, and it's unlikely your dad signed you up to a Genossenschaft 20 years ago. Some Germans may like to think of Germany as a country of immigrants, but it just isn't, regardless of how many live here.