Henry III, Duke of Brunswick-Grubenhagen
| 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 |
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.