J.R.R. Tolkien Invented the Pluralization "Dwarves"
Tolkien, in addition to establishing the genre of modern fantasy (I've just had a lengthy discussion with my English major wife about the legitimacy of this attribution), also created the word "dwarves" as a plural form...
https://www.neatorama.com/2011/02/13/j-r-r-tolkien-invented-the-pluralization-dwarves/