Many diaries appeared in the 17th century, written by Polish ambassadors, political mediators, soldiers or prisoners staying on the area of the State of Moscow. The excerpted materials for the study were: 1) diaries from the Dmitri period I and II, written by: Stanislawa Borsza, Jozef Budzilo, Abraham Rozniatowski, Mikolaj Scibor z Marchocic Marchocki, Samuel Maskiewicz, Jan Piotr Sapieha, Stanislaw Zolkiewski, Stanislaw Niemojewski, and 2) the first known Siberian diary by Adam Kamienski Dluzyk. The Works include names of places between Starodub and Yakuck. Russian names in the diaries, due to the form of contact, differs greatly from Russian names published in Polish, using West-European literary sources. However, the names functioned only temporarily, and did not influenced on the later forms of Russian names in Polish geographic literature.