Composer of "[I hate vain thoughts: but thy law do I love]" in The complete and unaltered text of Psalm 119 from the King James Bible in the form of Musical Settings 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