Boginki are minor deities in Slavic folklore that personify nature. They appear in many different forms and dwell in swamps, lakes, rivers, forests and mountains. They’re sometimes hostile and attack women during childbirth, switch babies with changelings and destroy fishing nets. Depending on the region, Boginki were thought to previously be women who committed suicide or died in childbirth. The babies taken by them and replaced with changelings could also be turned into Boginki. Images: Maria Apoleika, 1874
changeling
In Irish folklore, a changeling is a fairy child that was left in place of a human child stolen by the fae. Changelings often appear exactly like a human children but with strange differences such as long teeth, a full beard, uncanny intelligence and odd behavior. Jinn from Arabic folklore are also known to steal human children and replace them with changelings. Image: Titania and the Changeling Child (detail) by John Anster Fitzgerald, 1832-1906