The here to fore monographs compiled on the basis of historical material prove how much valuable information can be found in archives. Documentation of materials gathered from the dictionary entitled ‘Nazwy miejscowości w Polsce. Układ a tergo’, ed. by E. Jakus-Borkowa and K. Nowikowa, proves that the collection of acquired names is extremely rich (380 names) and interesting. Half of the collection comprises topographic (Podjaworze, Śródborze, Zagórze) and cultural names (Ołtarze, Podworze, Zatorze). The remaining part of the collection is names registering existence of game and domestic animals (Kozarze, Turze). However, the most interesting group includes eponyms such as: Grzegorze, Łazarze, Niemierze, Samborze / Szymborze and Sławoborze which have a distinct microtoponymic function (former parts of castellany, chapter or a village) located in various parts of Poland (podkarpackie, mazowieckie, podlaskie, warmińsko-mazurskie, kujawskopomorskie) from the 13th to 15th century.