Otto I, Duke of Brunswick-Lüneburg
| Otto the Child | |
|---|---|
Otto the Child is enfeoffed with Brunswick-Lüneburg by Emperor Frederick II, Lüneburg Sachsenspiegel, 1448 | |
| Duke of Brunswick-Lüneburg | |
| Reign | 1235–1252 |
| Predecessor | none |
| Successor | Albert the Tall John |
| Born | 1204 |
| Died | 9 June 1252 (aged 47–48) Lüneburg |
| Spouse | Matilda of Brandenburg |
| Issue | |
| House | Welf |
| Father | William of Winchester |
| Mother | Helena of Denmark |
Otto I of Brunswick-Lüneburg (about 1204 – 9 June 1252), a member of the House of Welf, was the first duke of Brunswick-Lüneburg from 1235 until his death. He is called Otto the Child to distinguish him from his uncle, Emperor Otto IV.