nazwiskiem

nazwiskiem

"Nazwiskiem" means "by (last) name" or "with the surname."

Here, 'nazwiskiem' is used to indicate the surname by which the teacher introduced himself, emphasizing the name provided was a surname.

Nowy nauczyciel przedstawił się nazwiskiem Kowalski.

The new teacher introduced himself with the surname Kowalski.

In this context, 'nazwiskiem' specifies the family name given when recalling the identity of a guest.

Nie pamiętam danych gościa, ale nazwiskiem był Nowak.

I do not remember the details of the guest, but his surname was Nowak.

Here, 'nazwiskiem' implies the signature on the book was done using the author's surname, showing its use as a tool of identification.

Książka została podpisana nazwiskiem autora.

The book was signed with the surname of the author.