Matthias Bel in his work Notitia Hungariae Novae historico-geographica offered a contemporary view of the condition, significance, response and specific features of the Hungarian counties within the Habsburg monarchy. The aim of the present study is a historical-geographical analysis and interpretation of Sections V., VI. and VII. of Paragraph V of the natural history work of Notitia of the Nitra County (1742) in which M. Bel described some water courses of the Váh River Basin: DVDVÁG (Upper Dudváh), BLAWA (Upper Blava) and HOLESCHKA (Holeška).