The hydronym of Careva Voda is mentioned in the boundary description of the Church of Saint Nikola in Pijanĭcĭ in the foundation charter of the Bishopric of Zletovo, which was issued by the Serbian Emperor Stefan Uroš IV Dušan (reigned 1331-1355) in 1346/47 (I ješte priloži svetoje carstvo mi episkopii zletovskoi Svetomu Arhangelu u Pijanci crьkov ь Svetago Nikole s ь selomь i sь vinogradomь i sь voděnicami i sь lugomь, i zemle stlьpь, počьiši otь Svetago Nikole do luga i vyše luga okola Brěsta luky do puta koi prěhodi otь Careva Sela i vyše Careve Vode po trapu). Our reasoning is based on the premise that the toponym "Car" (i.e. Tsar, Emperor) bears witness to imperial presence at the respective place. The toponym "Car" obviously indicates, apart from a possible physical presence of the Serbian Emperor, also a possibility of a causal link with the Byzantine Emperor or the Bulgarian Tsar. The respective hydronym could have been either a waterbody or an irrigation canal.