ribadyan is the Westron word for a person celebrating his or her birthday. Its equivalent, in Anglo-Saxon, would be byrding, where byrd means "birth".
- ↑ J.R.R. Tolkien; Humphrey Carpenter, Christopher Tolkien (eds.), The Letters of J.R.R. Tolkien, Letter 214, (undated, written late 1958 or early 1959)