Hamelin vs Hameln

Hamelin and Hameln both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hamelin	Yes	No	No	No
Hameln	Yes	No	No	No

As nouns, Hamelin and Hameln are synonyms defined as:

Hamelin and Hameln: a town in northern Germany (near Hanover) that is famous as the setting for the legend of the Pied Piper

Hamelin (noun)	Hameln (noun)
a town in northern Germany (near Hanover) that is famous as the setting for the legend of the Pied Piper	a town in northern Germany (near Hanover) that is famous as the setting for the legend of the Pied Piper