Before revision: Glendevon, Lanarkshire Glendivan, Dumfriesshire Glendow, Dumfriesshire - from Middle Irish glenn-dubh or Brittonic glyn-du ("dark valley").
After revision: Perthsihire Glendevon,Glendevon, Lanarkshire Glendivan, Dumfriesshire Glendow, Dumfriesshire - from Middle Irish glenn-dubh or Brittonic glyn-du ("dark valley").