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Children of Frederick II, Holy Roman Emperor

Frederick II, Holy Roman Emperor m. Constance of Aragon d. 1220(a) Margaret, Countess of Flanders and Hainault d. 1231(b) Joanna of England(c)

1a.Henry I of Sicily b. 1205 m. Margaret of Austria b. 1204, daughter of Leopold of Austria and Theodora Angelina, nephew of Frederick I of Austria

2a. Frederick, Duke of Swabia b. 1214 d. 1240 m. Agnes of Bohemia

3a. Beatrice b. 1212 m. Henry I of Ireland

4b. Baldwin of Flanders and Hainault b. 1223

5b. Joanna of Germany b. 1226 m. Alfonso X of Castile[1]

6b. Adelaide (Alexandra) of Germany b. 1230 m. Theodore II Laskaris

7c. Conrad, Duke of Swabia b. 1240

8c. Margaret of Germany b. 1242 married to Albert, Landgrave of Thuringia



Beatrice of Sicily b. 1193 (a)Vratislav of Bohemia d. 1220

1a. Margaret b. 1218 m. Boleslaw the bald of Poland

1. Son of Matilda of France and Ferdinand III of Castile