This is the 6750th most frequent French word.
koepke
"Koepke" is not a French word. It may be a proper noun or a term from another language.
In this sentence, 'Koepke' is used as a proper noun referring to a person, likely a name.
J'ai rencontré Koepke hier au café.
I met Koepke at the café yesterday.
Here, 'Koepke' is again a proper noun, referencing an individual's artistic style.
Le style de peinture de Koepke est vraiment unique.
Koepke's painting style is truly unique.
In this example, 'Koepke' refers to an author whose work is mentioned.