Hi, I have searched for what is the longest name of the world, and I've found these two things:
The longest name was probably strange village named Ŷj̈letüryzyxuf̈gegeferënzuzzuzunepopöÿoẍaẍarap̂aroq̈seg̈mürpaporinsarêp̂ÿv̂ÿv̈äxenyqereqeporörap̂eq̈rsögerpäd̈erepef̆ug̈ȷarej̈om in Peridia, now AR009c, which is now a lost country, so there is probably no future.
As the longest place name was also mentioned Kyrkøläniykaplællöllanynrannkoiaczuomenkirkønlællëtelsapøerti in Commonia. Unfortunately, it doesn't exist anymore.
There is a question if we have a place in lost country as the longest in the world, or a place, which doesn't exist anymore. Anyway, you can add here some more long names you know. My longest name is Ilisimasassarsiorporsuaq :-). Thanks for your names.