Sources

1) Source: Cosmas of Prague, The Chronicle of the Czechs "There lived in those times a very powerful count in the German lands by the name of Otto the White who was of royal descent through the male line. He had an only daughter by the name of Judith...Her good father and most goodly mother gave her over to a monastery called Schweinfurt". The chronicle further gives the story of how Bretislav kidnaps Judith. (Questionable reliability of evidence)
2) Source: Cosmas of Prague, The Chronicle of the Czechs "His wife Judith, of most noble origin and fertile in offspring,gave birth to five boys...The first born son was named Spytihněv, the second-born Vratislav, the third inline Conrad, the fourth in descent Jaromír, the fifth and last was Otto," (Data from secondary evidence)
3) Source: Cosmas of Prague, The Chronicle of the Czechs "n the year of the Lord’s incarnation 1058. On August 2, Judith, the wife of Břetislav and duchess of the Czechs died." (Data from secondary evidence)
4) Source: Cosmas of Prague, The Chronicle of the Czechs Bretislav's death in 1055 is described in detail by Cosmas. (Data from secondary evidence)
5) Source: Cosmas of Prague, The Chronicle of the Czechs "In the year of the Lord’s incarnation 1062. On January 27 the Duchess Adelaide died, mother of Judith, Ludmila, and of the younger Břetislav as well as of Vratislav" (Data from secondary evidence)
6) Source: Cosmas of Prague, The Chronicle of the Czechs "In the year of the Lord’s incarnation 1085. Judith, wife of Władisław, duke of the Poles, who was the daughter of Vratislav, duke of the Czechs, died on December 25" (Data from secondary evidence)
7) Source: Cosmas of Prague, The Chronicle of the Czechs "In the meantime, bad news burst upon our ears — that King Vratislav had departed to Christ on January 14" (Data from secondary evidence)