Person Name: Anadnabyddus Hymnal Title: Cân a Mawl Author of "Bydd mrydd o ryfeddodau (Unnumbered are the marvels)" in Cân a Mawl In some hymnals, the editors noted that a hymn's author is unknown to them, and so this artificial "person" entry is used to reflect that fact. Obviously, the hymns attributed to "Author Unknown" "Unknown" or "Anonymous" could have been written by many people over a span of many centuries.
Anonymous