If you are looking to have individual planet names, such as Mercury, Venus, Earth, Mars, instead of Sol I, Sol II, Sol III and Sol IV, I have not seen such a mod.
I wouldn't use it in my large galaxies because I don't need a situation where I can"t remember if the planet named Lydia is in the system named Ashton, Ashengray, or Ash Tray. Yeah, there"s a searchable planet list, but I like having a directly linked and obvious starname/planetname pattern.
Good luck on your search. If the planet names are procedurally generated, then the game isn't likely be able to deal with a list of names or a different model of star name and planet name relationship. Then again, a modder might speak up and say, "Oh, that's easy."