Iziaslav was the son of Vladimir I of Kiev and Rogneda of Polotsk. He was the progenitor of the Iziaslavichi of Polotsk.
When his father converted to Christianity in 988, he had to divorce all his previous wives, including Rogneda. Wikipedia
Born: 981 AD, Kyiv, Ukraine
Died: 1001 (age 20 years)
Great-grandparents: Olga of Kyiv, Igor of Kiev, and Mstislav of Libice
Great grandchildren: Rogvolod Vseslavich, Gleb Vseslavich, David Vseslavich of Polotsk, and more
Parents: Rogneda of Polotsk and Vladimir the Great
Children: Bryachislav of Polotsk and Vseslav Izyaslavich
Grandchild: Vseslav of Polotsk