changeling
definition: Child exchanged for another by fairies
in folklore,
a child who is secretly substituted for another one by
fairies
Here the mother, in the lower left corner, finds a changeling in the cradle while the troll sits in the tree with her baby.
This is the oldest known picture of a changeling, dating from the 14th century. The original can be found in Skamstrup church, North Western Zealand, Denmark.