Vem daterade Fredrik II (tysk-romersk kejsare)?

Fredrik Hohenstaufen, född 26 december 1194 i Jesi, Kyrkostaten, Tysk-romerska riket, död 13 december 1250 i Castel Fiorentino, Kungariket Sicilien, var tysk-romersk kejsare 1220–1250. Han var också kung av Sicilien 1198–1250, kung av Tyskland 1212–1220 samt kung av Jerusalem 1225–1243.

Adelaide di Urslingen, nome italianizzato di Alayta von Urslingen Marano (1200 circa – 1267), è stata la prima amante di Federico II di Svevia e la madre di Enzo di Sardegna, Caterina da Marano, ed Emma Ventimiglia.

Bianca Lancia d'Agliano (also called Beatrice, c. 1210 – c. 1248), was an Italian noblewoman. She was the mistress and later, possibly the last wife of the Hohenstaufen emperor Frederick II. The marriage was conducted while she was on her deathbed, therefore it was considered non-canonical.