Wikipedia
Tietjen
Tietjen is a German surname. Notable people with the surname include:
- Bettina Tietjen (born 1960), German television presenter
- Friedrich Tietjen (1834–1895), German astronomer
- Heinz Tietjen (1881–1967), German conductor
- John Tietjen (1928–2004), American Lutheran clergyman, theologian