1  Johann Heinrich Conrad Billerbeck    +  Anna Catharina Elisabeth Langmann (9 May 1723 – )      2  Christoph Langmann          +  (Name Unknown)            3  Anna Maria Elisabeth Langmann (1 Jan 1779 – )               +  (Name Unknown)                  4  Johann Conrad Langmann                      +  Anna Charlotte Festings                         5  Heinrich Christoph Langmann (25 Aug 1799 – )