Johann Friedrich Dreier was an arbeitsmann or workman from Mamerow who married Christina Catharina Sophia Martz. Christina was born on February 6, 1780 in Klaber, Germany and died in Mamerow on October 27, 1822.

They had at least two daughters.

  1. Sophia Elisabeth Hanna Dorothea Knaack born December 15, 1806 in Mamerow - She was the mother of Sophia Wilhelmina Fredericka  Adolphine "Rika" Heiden.
     

  2. Maria Dorothea Carolina "Dora" Dreier who married a Rogelein or Ruggelein or Roggelein or Regelin

Johann was the grandfather of Sophia Wilhelmina Fredericka  Adolphine "Rika" Heiden.