The Váh (German: Waag; Hungarian: Vág; Polish: Wag) is the longest river in Slovakia. A left tributary of the Danube river, the Váh is 406 km long, including its Čierny Váh branch. Its two sources, the Biely Váh (White Váh) and the Čierny Váh (Black Váh), are located in the High Tatras and Low Tatra mountains, respectively, and it flows over northern and western Slovakia and finally feeds into the Danube near Komárno. The left tributaries are Demänovka, Revúca, Ľubochnianka, Turiec, Rajčanka and Nitra rivers, and the right tributaries are Belá, Orava, Varínka, Kysuca, Biela voda, Vlára, Dubová, Dudváh and Malý Dunaj rivers. In late medieval time it was a property of Stibor of Stiboricz and his son Stibor of Beckov of the Clan of Ostoja.