Frederick I, Count of Celje styrian free noble (roughly equivalent to a baron) (d. 1359) Parents Ulrich II. of Sanneck countess Katerina, lady of Celje, co-heiress of Slovene lands of Heunburg Children Anna z Celje Hermann I, Count of Celje Ulrich I, Count of Celje Siblings Anna von Zovnek (Sannegg)