Otto I, Duke of Brunswick-Harburg | |
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| Born | 24 August 1495 |
| Died | 11 August 1549 (aged 53) Harburg |
| Noble family | House of Welf |
| Spouse(s) | Meta von Campe |
| Issue | Otto II Susanna |
| Father | Henry the Middle, Duke of Brunswick-Lüneburg |
| Mother | Margarete of Saxony |
Otto, Duke of Brunswick-Lüneburg (24 August 1495 – 11 August 1549) was the Prince of Lüneburg from 1520 to 1527 and Baron of Harburg from 1527 to 1549.