EntityQ703249· pop 23· linked from 88 articlesOtto the ChildSign in to saveGerman duke of Brunswick-LüneburgConnectionsBrunswick-LüneburgEntityFrederick II, Holy Roman EmperorEntityHouse of HohenstaufenEntityWilliam II of HollandEntityWilliam of LuneburgEntityJohn, Duke of Brunswick-LüneburgEntityMatilda of Brandenburg, Duchess of Brunswick-LüneburgEntityDenmarkConceptEnglandEntityFrankfurtEntityPopeEntityHoly Roman EmpireEntityJohn the BaptistEntitySchwerinEntityRostockEntityFrederick BarbarossaEntitydynastyEntityprinceEntityLüneburgEntityGregory IXEntityCategories1200s births1252 deathsBurials at Brunswick CathedralChristians of the Prussian CrusadeDukes of Brunswick-LüneburgHouse of WelfYear of birth uncertain