here - Nobility Associations

di Neocastro 2 names "Beatrix filia principis Antiochie" as the fourth wife of
"dominus Fridericus secundus…Romanorum…imperator". Zurita, presumably
basing himself on the same source, also names “Beatriz...hija del Principe de
Antioch” as the mother of “Federico de Antiochia”.
Children:
Frederick of Antioch (1221–1256)
Bianca Lancia d'Agliano (also called Beatrice and
Blanche) , an Italian noblewoman. Born ca. 1200/1210 in
Agliano Terme,
Bianca Lancia, the family of the Counts of Loreto, was the
only woman who truly conquered the difficult heart of
Frederick. The two met in 1225, a few months after the illfated
marriage with Jolanda of Brienne was a mutual love at
first sight. Not being able to tie the lawful marriage, the two maintained a
clandestine affair but far from secret, so that it had three children:
Constance
Manfredi (King of Sicily)
Violante.
According to a legend that has been handed down from father Bonaventure Lama
and recovery from the historic Pantaleo, during the pregnancy of Manfred,
Frederick's mistress kept locked in a tower of the castle of Gioia del Colle.
Matthew of Paris relates the story of a marriage in articulo mortis (on her
deathbed) between them when Bianca was dying, but this marriage was never
recognized by the Church. Nevertheless, Bianca's children were apparently
regarded by Frederick as legitimate, evidenced by his daughter Constance's
marriage to the Nicaen Emperor, and his own will, in which he appointed Manfred
as Prince of Taranto and Regent of Sicily
According to the Chronicle of Fra 'Salimbene of Parma, the wedding took place at
her deathbed 1233/1234). Therefore it was considered non-canonical.
Frederick II illegitimate children
Frederick II had several relationships outside of marriage, from which sprang his
many illegitimate children. He knew them all, making them breed at court and
giving them tasks and titles of nobility, but the identity of the mothers do not
always known.
2 Bartholomaeus of Neocastro (ca 1240 - post-1293) was a Sicilian jurist, and author of a
chronicle called the Historia Sicula, which covers the years from 1250 to 1293
The Hohenstaufen Dynasty - Page 60 of 200