Henry III, Duke of Brunswick-Grubenhagen

Henry III, Duke of Brunswick-Lüneburg (* 1416 Grubenhagen, † 20 December 1464), of the House of Welf, was a Duke of Brunswick-Lüneburg ruling the ducal Principality of Grubenhagen between 1427 and 1464.

Henry III, Duke of Brunswick-Grubenhagen
Born	1416
Died	1464
Spouse	Margaret of Sagan
Issue	Henry IV
House	House of Guelph
Father	Eric I, Duke of Brunswick-Grubenhagen
Mother	Elisabeth of Brunswick-Göttingen

Life

Henry was the eldest son of Eric I, Duke of Brunswick-Grubenhagen and Elizabeth of Brunswick-Göttingen, a daughter of Otto the Bad, Duke of Brunswick-Göttingen. After the death of his father in 1427, he ruled jointly with his younger brothers Ernest II and Albert II.

Until his coming of age in 1437 he was under the guardianship of Duke Otto II of Brunswick-Grubenhagen-Osterode. In the year 1447 a feud broke out between Henry and Louis I, Landgrave of Hesse, who was allied with the Archbishop of Mainz and the dukes of Göttingen. Louis and his allies besieged Grubenhagen Castle, but despite the deployment of two cannon, had to withdraw again. Even an attack on Salzderhelden was unsuccessful. Henry died in 1464 and was interred in the Alexanderstift in Einbeck. He was followed by his son, Henry.

Family

Henry married Margaret of Sagan (1415/25 – 9 May 1497), the daughter of John I, Duke of Sagan, and Scholastika of Saxe-Wittenberg before 27 June 1457. He was her third husband. They had two sons:

• Otto (b. 1458; d. as child)
• Henry IV (1460–1526) married Elisabeth of Saxe-Lauenburg (d after 7 April 1542), daughter of Duke John V of Saxe-Lauenburg.

Ancestors

Ancestors of Henry III, Duke of Brunswick-Grubenhagen

8. Ernest I, Duke of Brunswick-Grubenhagen 4. Albert I, Duke of Brunswick-Grubenhagen 9. Adelaide of Everstein-Polle 2. Eric I, Duke of Brunswick-Grubenhagen 10. Magnus II, Duke of Brunswick-Lüneburg 5. Agnes of Brunswick-Lüneburg 11. Catherine of Anhalt-Bernburg 1. Henry III, Duke of Brunswick-Grubenhagen 12. Ernest I, Duke of Brunswick-Göttingen 6. Otto I, Duke of Brunswick-Göttingen 13. Elisabeth of Hesse 3. Elisabeth of Brunswick-Göttingen 14. William VII of Jülich, 1st Duke of Berg 7. Margaret of Jülich-Berg 15. Anna of the Palatinate

Sources

• Ludwig Ferdinand Spehr (1880), "Heinrich III., Herzog von Braunschweig-Grubenhagen", Allgemeine Deutsche Biographie (in German), vol. 11, Leipzig: Duncker & Humblot, pp. 488–489