Heinz, Klaus, Rüdiger, Werner... That generation of German males had some quite distinctive names ... (Andreas, Oliver and Lutz still exist among people my age, so what's now below 50, even though I guess the names have by now died out as well). You don't happen to have the entire page, it looks like a fascinating piece of history overall? do you know the year? just from the names and how it reads, it feels like late 70s or even 80s to me.
those numbers indicate postcode areas btw, 1000 means Berlin, 2000 Hamburg, 3000 Hannover, 4000 Düsseldorf (even though the 0221 places Irmin in 5000 Cologne where he belongs... I would have been annoyed)