I want to know the answer to the following question:
Of the individuals that became intimate with Frédéric during their stay at the family apartments, which two became part of Frédéric's social environment in Paris?
All the background I'm provided with is that "Tytus Woyciechowski, Jan Nepomucen Białobłocki, Jan Matuszyński and Julian Fontana; the latter two would become part of his Paris milieu.". Is that enough to answer the question?