Frozza Orseolo
Frozza Orseolo (1015 – 17 February 1071) was a Margravine of Austria by marriage to Adalbert, Margrave of Austria. She was also a member of the Venetian House of Orseolo.

Life
Frozza was born in Venice as a daughter of Doge Otto Orseolo and his wife, Princess Grimelda of Hungary. 

Her father, grandfather, and great-grandfather were all Doges of Venice, and were members of the House of Orseolo, whose ancestors were the first historical Doges of Venice, the Ipatos. 

Her brother was Peter the Venetian, King of Hungary and she was possibly a sister-in-law of Judith of Schweinfurt.

She married Adalbert, Margrave of Austria, of the  House of Babenberg, and later took the name of Adelheid. They had a son named Ernest, Margrave of Austria.

References

1015 births
1071 deaths
11th-century Italian nobility
Austrian royal consorts
11th-century Venetian women
Frozza
Mothers of Austrian monarchs