Thielen
Thielen is the family name of the following people:
- Adam Thielen (* 1990), American football player
- Cornelia Quennet-Thielen (* 1957), German lawyer, State Secretary
- Friedrich Thielen (1916–1993), German politician
- Georg Thielen (1853–1901), German architect and craftsman
- Gerd Thielen (1942–2010), German civil engineer
- Gunter Thielen (* 1942), CEO of Bertelsmann AG
- Hans-Peter Thielen (1920–2012), German actor
- Harry Thielen (1930–2011), German civil engineer and professor of hydromechanics
- Helmut Thielen (* 1941), social philosopher, ecologist and agronomist
- Hermann Thielen (1844–1915), President of the Mülheim / Oberhausen Chamber of Commerce
- Hugo Thielen (* 1946), German independent publishing editor
- Karl von Thielen (1832–1906), Prussian Minister of State
- Karl-Heinz Thielen (* 1940), German soccer player
- Kurt Thielen (* 1958), German entrepreneur
- Michael Thielen (* 1959), German politician (CDU)
- Nikolaus Thielen (1901–1944), German politician (KPD)
- Peter Thielen (1806–1887), military chaplain and Prussian field provost
- Peter Heinrich Thielen (1839–1908), German composer
- Stefan Thielen (* 1977), German politician (CDU)
- Tracy Thielen (1963-2006), American actor and musician
IF Thielen
- was also a foundry in old Berlin , which u. a. Made a church bell for the Kaulsdorf village church in 1740
