nazwisku

In a sentence

• Mam pytanie o jego nazwisku.

  I have a question about his surname.

  Here, 'nazwisku' is used in the locative case, indicating the relation of 'having a question about the surname.' It relates to the inquiry regarding the surname in the context.

• Rozmawiałem z nim o nazwisku, które mi podał.

  I spoke to him about the surname he gave me.

  In this construction, 'nazwisku' appears in the locative case again, with the preposition 'o' that governs the locative case in Polish to indicate the discussion subject, which is the surname mentioned.

• Chciałbym pomóc w sprawie związanej z nazwisku.

  I would like to help in the matter related to the surname.

  Here, 'nazwisku' is used in the locative case once more within a phrase that references subjects connected to a surname. It indicates matters associated with the surname.