The present article musters the fifteen demons causing child-disease as they appear in written sources since the 14th up to the 21st century. Terminology of their names shows the development of language fashion in using Buddhist terminology: corrupted Sanskrit words taken from the Uighur were used in the 14th century, while Mongolian terms literally translated from Tibetan were applied in the 16th century and corrupted Tibetan names are fashionable in our days.