Nielsen Hayden genealogy
Family: Friedrich II, Holy Roman Emperor / Bianca Lancia (F15140)
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Male
Friedrich II, Holy Roman Emperor
Birth 26 Dec 1194 Death 13 Dec 1250 Burial Marriage Other Spouse (Unknown mistress of Friedrich II) | F15314 Marriage Other Spouse Isabella of England | F15145 Marriage 20 Jul 1235 Worms, Germany 
Father Heinrich VI, Holy Roman Emperor | F15139 Group Sheet Mother Constance of Sicily | F15139 Group Sheet
Male
+ Manfredo, King of Sicily
Birth 1232 Death 26 Feb 1266 Burial Spouse Beatrice of Savoy | F15137 Marriage Abt 1248