To avoid some confussion, the fact that Ortodox and Catholics from Russia, Poland or other countries never used names from the Old Testament has nothing to do with Jews or any sort of racism. It is based on the essence of Christianism itself.
Jesus came to reform the Jewish religion , bring good news and create a new from of life for Jews and for not Jews.
The Apostols that followed Jesus abandoned their previous life and engaged in a new style of life.
They had Jewsish names and Jesus changed their names by a new and different name, meaning that a new life has begin.
Names that belongs to the Old Testament are names of the past before Jesus, if you use a name from the Old Testament it means that you are living in the past without the reveleation of Jesus or you haven't accepted Jesus.
The most common names used by Russians are from the New Testament, but they also use ancient traditional names that has nothing to do with Christianism and the Church was unable to overcome their old tradition.

Stupidity also evolves!