 The so-called "Catalogue de St. Pierre", which names St. Diogenus (Diogenes) as the first Bishop of Geneva, is unreliable.A letter of St. Eucherius to Salvius makes it almost certain that the name of the first bishop (c. 400) was Isaac.In 440, Salonius appears as Bishop of Geneva; he was a son of Eucherius, to whom the latter dedicated his Instructiones'; he took part in the Council of Orange (441), Vaison (442) and Arles (about 455), and is supposed to be the author of two small commentaries, "In parabolas Salomonis" and on Ecclesisastis.