The word hillbilly refers to a negative stereotype of people from Appalachia. The term hillbilly is considered to be a modern term because it showed up in the early 1900s. Though the word is Scottish in origin, but doesn't derive from dialect.
The term "hillbilly" refers to a pejorative image of individuals from Appalachia, which originated in the early 1900s. Despite its Scottish roots, the word is not derived from regional dialect.