Elle-people

It is also necessary to watch cattle so that they may not graze in any place where the Elle-people have been. If any animal goes to a place where the Elle-people have spit or done what is worse, it is attacked by some grievous disease, which can only be cured by giving it a handful of St. John's wort, which was pulled at twelve o'clock on St. John's night.

Source: wiktionary

"I tremble at the very thought of the Elle-people of whom our villagers tell, while thou hast not a single fear. Why is it, sister?"

Source: wiktionary