Are the Dragon names based on anything? Just some random curiosity about the Dragons in Fairy Tail. 


Acnologia,
Igneel,
Grandeeney,
Weisslogia,
Metalicana,
Skiadrum,
Atlas Flame,
Zirconis,
Motherglare,
Scissor Runner,
Revire,
Dark Dragon,
Rock Dragon


Are their names based on anything?
It seems some of their names have parts which relate to their nature:


Weisslogia: Weiss or Weiß is German for "white". Sting performs White Dragon Slayer to produce beams of sacred light, so we can see how White factors into Weisslogia's name.
Metalicana: Obviously, the use of Metal in its name reflects the Iron Dragon Slayer Magic Gajeel uses
Skiadrum: Skia or "σκιά" is Greek for shadow, and Skiadrum is the Shadow Dragon.
Atlas Flame: Atlas is the name of a Greek god, but I do not know how it would relate to the character. Images I have seen of this dragon show that it's totally wrapped in flames, and its title is also the Flame Dragon
Motherglare: This may be related to its Egg Magic. In most cases, mothers use a form of egg to give birth to children. In a lot of fictional works, Dragons lay eggs to give birth.
Scissor Runner: May be a reference to the two huge spines coming out of the top of its head and its chin
Rock/Dark Dragons: Obviously for their appearance. However, those aren't their names, but how they are referred to due to their appearance.
(Revire has a somewhat aquatic appearance, and its name is pronounced as "Rivaia", which kinda sounds like river. However, that is a long shot.)


I couldn't find anything on Acnologia, Igneel or Grandeeney.

I should point out that I have not read the manga nor watched enough of the anime (I have seen like 50 episodes), and I found out all of these by google searching for images, picking apart their names and looking up Wikipedia articles. Someone else may have a more accurate answer. These are just my observations and may help others fill in holes in their own research.