Ulf married Estrith Svendsdatter OF DENMARK in 1018. Estrith (daughter of Sweyn I 'Forkbeard' Haraldsson KING OF DENMARK and Sigrid 'the Haughty' Storrade OF SWEDEN) was born about 967 in Denmark; died after 9 May 1032; was buried in Roskilde, Denmark. [Group Sheet]