Dreow

The dreow, or dryad, is the elemental associated with scholars, craftsmen, and other seekers of beauty or truth. While dreowic reactions do not command the raw power of fire or the subtlty of water magic, wood elementals are easy to command and very unlikely to turn upon their weilders. Unlike any other elementals, dreowi are also willing to work creatively with their weilder as equal partners, although they seldom merge bodies with their host. Most often they can be seen in their individual forms, which range in size from beetle to small hill. Dreowi are gregarious in nature, and, in the wild, congregate in ambulatory forests.

Etymology:
Old Celtic: dru=tree
Old English: treow=tree, truth
Irish: draoi=druid
Greek: dryas=wood nymph
Greek: drus=oak

Done while listening to Jonathan Strange and Mr. Norrell