Frederick I, Duke of Brunswick-Osterode (c. 1350-1421)[citation needed] was a son of Duke Ernest I and his wife, Adelaide of Everstein-Polle.
[1] In 1361, he succeeded his father as Count of Osterode.
He married Adelaide (d. before 1421), a daughter of Bernhard V, Prince of Anhalt-Bernburg, and was the father of Otto II (1396-1452), who succeeded him.
[citation needed] He may have also married Elizabeth, heiress of Homburg.
This article about a German duke is a stub.