northernmost part of the Scandinavian peninsula, 1570s, from Lapp, the Swedish name for this Finnic people (their name for themselves was Sabme), which probably originally was an insulting coinage (compare Middle High German lappe "simpleton"). "Formerly, the fabled home of witches and magicians, who had power to send winds and tempests" [OED]. Related: Laplander.
<a href="https://www.etymonline.com/word/Lapp">Etymology of Lapp by etymonline</a>
Harper, D. (n.d.). Etymology of Lapp. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Lapp