Frederick Ulrich, Duke of Brunswick-Lüneburg

Frederick Ulrich
Duke of Brunswick-Lüneburg, Prince of Brunswick-Wolfenbüttel
Spouse(s) Anna Sophia of Brandenburg
Noble family House of Guelph
Father Henry Julius, Duke of Brunswick-Lüneburg
Mother Elizabeth of Denmark
Born (1591-04-05)5 April 1591
Died 11 August 1634(1634-08-11) (aged 43)

Frederick Ulrich (German Friedrich Ulrich, 5 April 1591 – 11 August 1634), Duke of Brunswick-Lüneburg, was prince of Wolfenbüttel from 1613 until his death.


Frederick Ulrich was the son of Duke Henry Julius of Brunswick-Wolfenbüttel (1564-1613) and his second wife Princess Elisabeth of Denmark (1573-1625), the eldest daughter of King Frederick II of Denmark. Frederick studied at the universities of Helmstedt and Tübingen, and became ruling duke after the death of his father in 1613. In 1615, Frederick became involved in a war with the City of Brunswick, which was reluctant to recognize his overlordship.

Between 1616 and 1622, he was de facto deposed by his mother, Elizabeth, with the help of her brother, King Christian IV of Denmark, because of his alcoholism; government business was led by Anton von Streithorst, who nearly ruined the state by minting coins from cheap metals and thus causing inflation. Because of the bad situation of the state, Christian had Frederick take control of the government again. With the help of the states' nobility, he managed to regain control; the members of the Streithorst government fled the state.

Because of Frederick's indecision and weakness, Brunswick was heavily ransacked during the Thirty Years' War — both by the Catholic forces of Tilly and Pappenheim and by the Protestant forces of Christian of Denmark and Gustavus Adolphus of Sweden. The duke lost most of his territory during this time. He died after an accident in 1634.

Marriage & Family

Frederick Ulrich married Anna Sophia (1598-1659), daughter of John Sigismund, Elector of Brandenburg, in 1614. They had no children and Frederick tried to get a divorce from Anna, though he died before the divorce was completed. Anna Sophia spent her widowhood in Schöningen, where she founded a renowned school, the Anna-Sophianeum.


Frederick Ulrich's ancestors in three generations
Frederick Ulrich, Duke of Brunswick-Lüneburg Father:
Henry Julius, Duke of Brunswick-Lüneburg
Paternal Grandfather:
Julius, Duke of Brunswick-Lüneburg
Paternal Great-grandfather:
Henry V, Duke of Brunswick-Lüneburg
Paternal Great-grandmother:
Mary of Württemberg
Paternal Grandmother:
Hedwig of Brandenburg
Paternal Great-grandfather:
Joachim II Hector, Elector of Brandenburg
Paternal Great-grandmother:
Magdalena of Saxony
Elizabeth of Denmark
Maternal Grandfather:
Frederick II of Denmark
Maternal Great-grandfather:
Christian III of Denmark
Maternal Great-grandmother:
Dorothea of Saxe-Lauenburg
Maternal Grandmother:
Sofie of Mecklenburg-Schwerin
Maternal Great-grandfather:
Ulrich III of Mecklenburg-Schwerin
Maternal Great-grandmother:
Elizabeth of Denmark


Frederick Ulrich, Duke of Brunswick-Lüneburg
Cadet branch of the House of Este
Born: 5 April 1591 Died: 11 August 1634
Regnal titles
Preceded by
Henry Julius
Duke of Brunswick-Lüneburg
Prince of Brunswick-Wolfenbüttel

Succeeded by
Augustus the Younger
Duke of Brunswick-Lüneburg
Prince of Calenberg

Succeeded by
Duke of Brunswick-Lüneburg
Prince of Grubenhagen
only de facto, not de jure

Succeeded by
Christian the Elder
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