• Friedrich Tietjen
  Friedrich Tietjen
  Friedrich Tietjen was a German astronomer.He was director of the Astronomisches Rechen-Institut from 1874 until his death in 1895....
  
   (1834, Westerstede
  Westerstede
  Westerstede is the capital of the Ammerland district, in Lower Saxony, Germany. It is situated approx. 25 km northwest of Oldenburg.-External links:*...
  
   - 1895), a German astronomer
• 2158 Tietjen
  2158 Tietjen
  2158 Tietjen is a main-belt asteroid discovered on July 24, 1933 by K. Reinmuth at Heidelberg.- External links :*...
  
  , an asteroid, discovered on 1933 by K. Reinmuth (1943 - 1993), German politician (SPD
  Social Democratic Party of Germany
  The Social Democratic Party of Germany is a social-democratic political party in Germany...
  
  )
• Heinz Tietjen
  Heinz Tietjen
  Heinz Tietjen was a German conductor and music producer born in Tangier, Morocco.- Biography :At age twenty-three, he held the position of producer at the Opera House in Trier and was appointed its director in 1907, holding the dual roles until 1922...
  
   (1881 - 1967), German conductor (1988), German authoress
• John Tietjen
  John Tietjen
  John Tietjen was a Lutheran clergyman, theologian, and national church leader in the United States. He is best known both for his role in the Seminex controversy which roiled the Lutheran Church - Missouri Synod in the mid-1970s, and for his efforts on behalf of Lutheran unity that resulted in...
  
   (1928 - 2004), American Lutheran clergyman, theologian (1873 - 1924), German politician

See also

• Wilhelm-Tietjen-Stiftung für Fertilisation
  Wilhelm-Tietjen-Stiftung für Fertilisation
  The Wilhelm-Tietjen-Stiftung für Fertilisation Ltd. is a controversial fertility research group. Its critics have described it as a far-right extremist organization with links to Neo-Nazism and Nazi eugenics theories....
  
  , a controversial fertility research group