Usage of the word heathen in the last five centuries peaked dramatically several separate times: in the 1520s, 1590s, 1600s, 1640s, 1750s, and 1840s. Perhaps that's when people were feeling particularly religious. Today, the word refers to any individual(s) outside of the scope of a major religion, but when it was encompassed by the Middle English word hethen, it referred specifically to people who weren't Christians or Jews. Same goes for the Old English word haethen, which was merged with Old Norse heithinn, meaning "pagan", to create the precursor to today's term. Both of those derive from Proto-Germanic haithi, a word meaning "uncultivated soil" (because pagans were "religiously uncultivated"; this is also the etymon of English heathland, "shrublike infertile land"), from Proto-Indo-European skayt, or "clear"
Hello! I'm Adam Aleksic. This year, I graduated from Harvard University with a degree in Government and Linguistics. There, I co-founded the Harvard Undergraduate Linguistics Society and wrote a thesis on Serbo-Croatian language policy, magna cum laude. In addition to etymology, I also really enjoy philosophy, trivia, vexillology, geography, board games, conlanging, art history, and law.