The territory of Zhytomyr Polissia is rich in toponymic proper names of local significance geographic features. Names ending in -iv (-ov-, -ev-), -yn occupy a prominent place among the studied microtoponyms. Microtoponyms formed with the help of such formants reflect the system of local names of individuals, based on nicknames and personal names. Furthermore, personal names, as the basis for microtoponyms, are significant in terms of being a broad field for the creativity of people, thereby reflecting their worldview. The boundary between the aforementioned types of anthroponyms is often blurred since all lexemes that are now proper names of individuals could have functioned as common nouns in the past. Today, a surname is semantically neutral, as it is merely the name of a person inherited from an ancestor, indicating a characteristic feature of that ancestor. Therefore, in this article, our goal is to review and characterize the semantics of anthroponyms that motivated the formation of possessive models of microtoponyms with the formants -iv (-ov-, -ev-), -yn. A significant group consists of microhydronyms based on diminutive forms of Christian names, such as Vakulkova, Hrytskiv Luh, Yemilchyne, Klymkove, Kostykove, Levkove, Mykolaichykove, Natalchyne, Onyskove, Opanaskove, Petrykove, and so on. Informative are microtoponyms derived from anthroponyms, indicating the origin or place of residence of their owners (Lytvynova, Polyachkove) and personal names, indicating social affiliation or a person's permanent occupation or profession (Bosiakove, Holiakova, Diakova, Kovalova, Ksiondzove, Tsariv Lisok, Shevtseva Nyva and so on). The weighty category of nicknames, derivatives for local microtoponyms, consists of those characterizing a person by their appearance, physical features, and temperament: Zhmakove, Matloshove, Morhunove, Pospishylove, Psiurove, Strakhiv, Tsiupove, Shlapakove. These anthroponyms are interesting because the nicknames indicate the most prominent characteristic of a person, whether physical or moral (often exaggerated). Overall, the anthroponymy of Zhytomyr Polissia that motivated the formation of microtoponyms, despite conforming to common Ukrainian features, reflects dialectal and territorial characteristics of local names of geographic objects.