Sigrid the Haughty, Sigrid Storråda, (most probable original Slavic name Światosława) (967 - 1014) was the daughter of mythical Burislav (almost certainly Mieszko I of Poland and Dubrawka. In 980 (possibly 985) she married Eric VI of Sweden. She may have given birth to Olof Skötkonung who later became king of Sweden, but some doubt that. After 994 she married Sweyn I of Denmark under the name Gunhilda. From this second marriage she probably had five children, including Canute the Great and Harald II of Denmark.
The medieval chroniclers generally confirm the assumption that her father was Mieszko I, but saga authors (most important of which is Snorri Sturluson) put her father as Skogul Toste.
Her Slavic name is generally agreed as Świętosława, but only as a reconstruction based on a single mention that her daughter was "Santslaue soror CNVTI regis nostri" from the "Liber vitae of the New Minster and Hyde Abbey Winchester" and assumption, that mentioned that the daughter would be called after her mother.