Iziaslav Yaroslavich (1024-1078), Kniaz' (Prince) of Turaw, Veliki Kniaz (the Grand Prince) of Kiev (since 1054), the oldest son of Yaroslav I the Wise. Iziaslav was one of the authors of "Pravda Yaroslavichey" - a part of the first Russian legal code called Russkaya Pravda.

In 1043 his father Veliki Kniaz (Grand Prince) Yaroslav I made an agreement with King Casimir I of Poland that recognized Cherven as part of Kiev. The agreement was sealed with a double marriage—Casimir to Dobronega, Yaroslav's sister; and Iziaslav to Gertrude, Casimir's sister. From this marriage was born Iziaslav's son Yaropolk. His other son, Sviatopolk, was illegitimate.

As a result of the popular uprising in 1068, Iziaslav was deposed and fled to Poland. In 1069 he retook Kiev with the help the Polish army, however, he was ousted again by his brothers in 1073. Iziaslav turned to the German emperor, the Polish king, and the Pope for help on several occasions. In 1077 he succeeded in retaking Kiev once again, but soon died in an internecine war against princes Oleg Sviatoslavich and Boris Viacheslavich.