Moskva River
The Dyakovo culture was probably formed by Finno-Ugric peoples, such as the ancestors of the Merya, Muromian, Meshchera, and Veps tribes. All regional Finno-Ugric toponymy and hydronym names go back to those languages, for example Yauza River which is a confluent of the Moskva River, and probably the Moskva River itself too.