This is the 5752nd most frequent French word.
châtillon
"Châtillon" is a proper noun, often referring to a place name in France.
In this sentence, 'Châtillon' is used as a proper noun referring to a specific location, a commune in France.
Châtillon est une charmante commune située dans les Hauts-de-Seine.
Châtillon is a charming commune located in Hauts-de-Seine.
Here, 'Châtillon' again serves as a proper noun, identifying a geographical location to provide context to the sentence.
Nous avons visité un ancien château qui se trouve près de Châtillon.
We visited an old castle located near Châtillon.
In this instance, 'Châtillon' is used to indicate a family name, referring to the hosts of the mentioned event.