I'd always know the word "toboggan" to mean a sled. In the last couple years I've met people who insisted on calling their winter knit caps "toboggans." All of these people happened to be from either Kentucky or Tennessee. Wikipedia mentions that
In the United States south and midwest, especially Appalachia, it is often called a "toboggan".
but there's no info about origin. When and where did this usage come from?