Otto IV was the Holy Roman Emperor from 1209 until his death in 1218.
Otto spent most of his early life in England and France. He was a follower of his uncle Richard the Lionheart, who made him Count of Poitou in 1196. Wikipedia
Born: 1175, Braunschweig, Germany
Died: May 19, 1218 (age 43 years), Canossa Pillar, Bad Harzburg, Germany
Parents: Henry the Lion and Matilda of England, Duchess of Saxony
Spouse: Maria of Brabant, Holy Roman Empress (m. 1214–1218) and Beatrice of Swabia (m. 1212–1212)
Place of burial: Brunswick Cathedral, Braunschweig, Germany
Cousins
Henry III
via Matilda of England, Duchess of Saxony
Richard of Cornwall
via Matilda of England, Duchess of Saxony
Blanche of Castile
via Matilda of England, Duchess of Saxony
Philip of Cognac
via Matilda of England, Duchess of Saxony
Berengaria of Castile
via Matilda of England, Duchess of Saxony
Isabella of England
via Matilda of England, Duchess of Saxony