Cognitialis.
Based on a latin word "cognitionis", which means - knowledge.
I feel, it's an appropriate name for the race. They look like a cloud of gas, or energy. As I understand, their main idea is to spy and manipulate other factions, which means, they have to collect onformation and have points of pressure, to easily persuade their targets. Also, as they are basically a cloud, which suggests that they exist on a different plain and do not interact with others with conventional methods, it means that, to others, they are just a flying consciousness. Thus, knowledge and manipulation is everything to them.