Catholic Encyclopedia: St. Rupert's name is sometimes given as Hrodperht, Hrodpreht, Roudbertus, or Rudbertus. First bishop of Salzburg, died around 718.
For All the Saints: St. Rupert of Salzburg is also known as St. Hrodbert, Robert, or Ruprecht. Essay with links to other saints with whom St. Rupert was associated.
St. Pachomius Library: Two Lives of St. Rupert, translated from the Acta Sanctorum. St. Rupert is also called St. Hrodibert.
The Ecole Glossary: Biographical sketch of St. Rupert of Salzburg, by Karen Rae Keck.