This is the 7412th most frequent Turkish word.
geoffrey
The word "Geoffrey" is not a Turkish word; it is an English given name.
Here, 'Geoffrey' is a proper noun referring to a person's name, used as the subject of the sentence.
Geoffrey çocukken çok kitap okurdu.
Geoffrey used to read a lot of books as a child.
In this sentence, 'Geoffrey' is used to specify the name of the person the speaker met.
Geoffrey adında bir kişiyle tanıştım.
I met a person named Geoffrey.
Here, 'Geoffrey' is used as a possessive noun indicating the author of the article.