Dietrich of Oldenburg, German nobleman

Dietrich, Count of Oldenburg

German noble (c. 1398 – 1440)

Dietrich or Theoderic of Oldenburg was a feudal lord in Northern Germany, holding the counties of Delmenhorst and Oldenburg. He was called "Fortunatus", as he was able to secure Delmenhorst for his branch of the Oldenburgs.