sentences:  For Catholic Slavs, the decisive event was the Council of Trent (1545–63) decreed that every Catholic should have a Christian name instead of a native one.After the ban on native non-Christian names imposed by the Council of Trent, the Polish nobility (especially Protestants) attempted to preserve traditional names, such as Zbigniew and Jarosław.Ordinary people, however, tended to choose names solely from the Christian calendar, which contained only a handful of Slavic saints' names, in particular