ranu
Ranu is a toponym in Indonesia, especially Java, used for several lakes in volcanic regions. In Javanese, ranu is commonly translated as “lake,” and many crater-lake names on Java begin with this element. Notable examples include Ranu Pane and Ranu Kumbolo, both high-elevation lakes that lie along popular trekking routes to Mount Semeru. Ranu Pane is commonly cited as a starting or staging area for climbers, while Ranu Kumbolo is widely recognized for its scenery and as an overnight campsite on the Semeru ascent. The lakes are formed in volcanic craters and maintained by local rainfall and springs; they are part of the broader volcanic landscape of East Java and are subject to seasonal weather and volcanic activity in the region.
Beyond toponyms, Ranu is also used as a personal name in Indonesia and some neighboring regions. It
In addition to Indonesian geography and naming, the term appears in other contexts as a given name