>> Meanwhile, am especially interested in fake humans as they are connected
>> with false or deceptive magic or rhetoric-- which may be a late medieval
There is a norse myth about a clay monster ("Skjalfi"?...don't have any
refs at hand) constructed by the giants to defend them from the wrath
of Thor. There is also the creature "Ullikummi" (in Hurrian myth) who
was made of diorite by Kumarbi to attack Teshub, a usurper. Many
mythographers compare this to the greek myth of Typhon.
About changelings, in _Origins_:
2. The ON alfr yields oaf, ..., an elf's child, hence a
changeling, hence an uncouth child, hence a dolt, a lout.
It appears that changelings were one way of explaining a retarded child
without accusing either parents or families of deformity. "Fake human"
is probably a good description.
Blodeuedd, a character in the _Mabinogion_, is made from various plants.