* Charon: The largest moon of Pluto and is so large compared to Pluto that they are sometimes considered a binary system.

* Styx: Discovered in 2012.

* Nix: Discovered in 2005.

* Kerberos: Discovered in 2011.

* Hydra: Discovered in 2005.

These names are all inspired by Greek and Roman mythology, just like Pluto itself.