William of Luneburg Lord of Luneburg (1184–1213) Parents Matilda of England, Duchess of Saxony Henry the Lion Children Otto the Child Siblings Gertrude of Bavaria Matilda of Saxony Henry V, Count Palatine of the Rhine Otto IV, Holy Roman Emperor Ingibiorg von Sachsen son von Sachsen Eleanor von Sachsen Lothaire von Sachsen Rixa von Sachsen Maud von Braunschweig Partners Helena of Denmark
