Nac mac feegle

The Nac Mac Feegle are a race of small blue humanoids, who tend to speak with Scottish accents. They come from the Discworld and are unsure of how they came to be on ours. They seem to believe that they are already dead and in the afterlife. This belief stems from the fact that they see our world as being too good to be true because it is full of things to fight, steal, and drink. They live in large groups called clans. These clans are lead by a mother figure called the "kelda." The kelda is the mother of the clan, baring her husband (the Big Man) and the few Feegles she brought from her previous clan. The women Feegles, being extremely rare, are much smarter than the male Feegles. Feegles show a mistrust of the written word and often refuse to sign anything reasoning that if you write your name down it will lead to your arrest. The Nac Mac Feegle don't trust lawyers and I have heard rumors of some with swords that glow blue in their presence.

Excerpt from: Life Among the Blue People by Rincewind, Egregious Professor Of Cruel And Unusual Geography

Suggested further reading: The Wee Free Men by Terry Pratchett