szymon

In a sentence

• Szymon jest moim kuzynem.

  Szymon is my cousin.

  Here, 'Szymon' is used as a proper noun, referring to a specific person.

• Czy widziałeś ostatnią książkę Szymona?

  Have you seen Szymon's latest book?

  Here, 'Szymona' is the possessive form of the name 'Szymon', showing ownership.

• Rozmawiałem z Szymonem wczoraj.

  I talked with Szymon yesterday.

  Here, 'Szymonem' is the instrumental case form, indicating the person with whom the action was performed.