Pluto's new moons named: Nix and Hydra
Blog post about discovery
"The 'P' and the 'L' in Pluto are in honor of the Percival Lowell, who instigated the search that resulted in the discovery of Pluto," Stern told Space.com. "The 'N' and the 'H' are exactly parallel to honor New Horizons which instigated the search that led us to [the new satellites]."
Info from the Southwest Research Institute