EN
The article analyses Polish oikonyms ending in -atka, discussing whether this ending is a suffix, i.e. -at-ka, or simply appears to be one. Based on the method of morphological division, the findings suggest the existence of two distinctive groups of oikonyms: those with the suffix -at-ka, and those with three extended variants of this suffix: -ow-at-ka, -aw-at-ka and -ew-at-ka.