here - Nobility Associations

Conrad IV (25 April 1228 – 21 May 1254).
Isabella of England. (1214 – 1 December 1241). Marriage:
15 July 1235, at Worms, Germany.
Isabella was the sister of Henry III of England. It was
Gregory IX in 1235 to advocate the wedding to allow the
emperor to get close to the rich Germanic Guelph that even
he could not control and the potentates across the Channel.
In fact, the goal was achieved only in part, and before that
Frederick could complicate his part family relationships with
the English crown, the framework of diplomatic and military
operations moved to Italy, nor reduced the claims of German nobles. Isabella was
the mother of Henry said “Carlotto”, she died at a very young age in 1241, in the
middle of the conflict of her husband with Gregory IX.
Children:
Jordan (born during the Spring of 1236, failed to survive the year).; this
child was given the baptismal name Jordanus as he was baptized with water
brought for that purpose from the Jordan river;
Agnes (b and d. 1237).
Henry Otto (18 February 1238 – May 1253), named after Henry III of
England, his uncle; appointed Governor of Sicily and promised to
become King of Jerusalem after his father died, but he, too, died within
three years and was never crowned. Betrothed to many of Pope Innocent
IV's nieces, but never married to any.
Frederick (1239/1240 – died young)
Margaret (1 December 1241 – 8 August 1270), married Albert, Landgrave of
Thuringia, later Margrave of Meissen.
Matilde Maria (Beatrice) of Antioch of the Hautville.
Princess Mathilde or Maria of Antiochia daughter of
Bohemund III "the Stammered" Prince of Antioch, 1144 - 1201
and Costanza, daughter of Philip I King of France.
Marriage of Mathilde with the Emperor Fredrick II,
Bartolomeo da Neocastro (History, cit., P. 21) and Pirro (See A. Pirro, Sicilia, cit.,
Pp. 25-35) says that the mother of Frederick is legitimate wife of the Emperor.
The Thomas Tusci Gesta Imperatorum et Pontificum refers to the mother of
"Fredericus qui de Antiochia" as "Antiocha dicta". The primary source which
specifies her name has not yet been identified. The Historia Sicula of Bartolomeo
The Hohenstaufen Dynasty - Page 59 of 200