

Hereditary Grand Duchess of Oldenburg (1899–1948)
Helene Bathildis Charlotte Maria Friederike zu Waldeck und Pyrmont (* 22. December 1899; † 18. February 1948) was a hereditary Grand Duchess of Oldenburg. She was 48 years old. She was married to Nikolaus von Oldenburg. She had at least 7 children (5 sons and 2 daughters).