King of Denmark Valdemar (The Great) Knudsen I & Queen of Denmark Sofiya Vladimorovna 
The Great and Sofiya were married in 1157.1 They had two sons and five daughters, named Knud, Sejr, Sophie, Ingeborg, Helene, Helene and Richiza.
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Personal Details
King of Denmark Valdemar (The Great) Knudsen I
Valdemar, known as The Great, was born on January 14th, 1131 in Roskilde, Denmark.1 He died at the age of 51 on May 12th, 1182.1
Queen of Denmark Sofiya Vladimorovna
Sofiya was born in 1141 in Novgorod, Russia.1 She died at the age of 57 on May 5th, 1198.1
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Children
King of Denmark Valdemar (Sejr) Valdemarsson II
Valdemar, known as Sejr, was born on June 28th, 1170 in Ribe, Denmark.2
Princess Helene of Denmark
Helene was born in 1176 in Roskilde, Denmark.1 She died at the age of 57 on November 22nd, 1233.1
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I34141&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I34140
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I34140