Kithain is the name Changelings use to describe themselves. Specifically, the Kithain are the kith born of mortal dreams who possess both a Seelie and Unseelie Legacy. They include the Sidhe and all the commoner kiths.
Other, non-Kithain fae include the Thallain (monstrous versions of the Kithain), the Gallain and the Adhene. Animate Chimera may be alive, but are purely the creatures of the Dreaming, and not generally considered fae.