Titan

Rivers
Here's a list of fictional rivers created for each lake/sea on Titan, so that each has four rivers entering it:

Kraken Mare:


 * 1) Hapi Flumen: Named after the ancient Egyptian deity Hapi, who was associated with the annual flooding of the Nile River. This fictional river can be associated with the Nile-like river that stretches for over 400 kilometers (249 miles) and empties into Kraken Mare.
 * 2) This is somewhat real. River exists but unnamed
 * 3) Sobek Flumen: Named after the ancient Egyptian crocodile god, who was also associated with the Nile River.
 * 4) Khnum Flumen: Named after the ancient Egyptian god of the Nile's source, who was believed to create all things from the river's clay.
 * 5) Anuket Flumen: Named after the ancient Egyptian goddess of the Nile, who was also the goddess of hunting and war.

Ligeia Mare:


 * 1) Gihon Flumen: 225 km
 * 2) Kokytos Flumina: 305 km
 * 3) Vid Flumina: 158 km
 * 4) Xanthus Flumen: 78 km

Punga Mare:


 * 1) Apanohuaya Flumen: 64 km
 * 2) Sambation Flumina: 210 km
 * 3) Tiberinus Flumen (fictional): Named after the Roman god of the Tiber River, which runs through Rome.
 * 4) Danuvius Flumen (fictional): Named after the Latin name for the Danube River, which is one of Europe's major rivers.

Ontario Lacus:


 * 1) Hubur Flumen: 84 km
 * 2) Karesos Flumen: 83 km
 * 3) Saraswati Flumen: 2.9 km
 * 4) Inachus Flumen (fictional): Named after the Greek river god Inachus, the father of Io in Greek mythology.

Jingpo Lacus:


 * 1) Cephissus Flumen (fictional): Named after the Cephissus River in ancient Greece, associated with the god of the same name.
 * 2) Alpheus Flumen (fictional): Named after the river god Alpheus in Greek mythology, who was associated with the Alpheus River in the Peloponnese.
 * 3) Yamuna Flumen (fictional): Named after the Yamuna River in India, which is a sacred river in Hinduism and has its origin in mythology.
 * 4) Purus Flumen (fictional): Named after the Purus River in South America, which is a tributary of the Amazon River and has its own mythical associations with the indigenous people of the region.

Please note that these fictional rivers are created for the purpose of this exercise and are not based on any existing data from the Cassini-Huygens mission or other sources.