jakob

In a sentence

• Jakob ma nowego psa.

  Jakob has a new dog.

  Here, 'Jakob' is used as a proper noun, someone's name.

• Zachowuje się jakob by był niewinny.

  He acts as if he were innocent.

  In this sentence, 'jakob' functions as a variant spelling for 'jakby', which serves as a conjunction meaning 'as if'.

• Co tydzień widuję się z Moim kuzynem Jakobem.

  I meet with my cousin Jakob every week.

  Here, 'Jakobem' is the instrumental case of the proper noun 'Jakob', used to indicate association or interaction.