in 1646 and 1649 he was godfather to children who also had Dutch godparents: on 18 September 1646 this was the case when a child of his brother Hans, a cutler, was baptized. Both Falck, Anna Hondius, daughter of Wilem Hondius and Anna Mercator were present at the baptismal; worked with Willem Hondius. In this period he worked for the Polish court and hence called himself 'Polonus' (Feuβ)