Kavadh I died in 531.
Kavadh I was born in 449.
Mazdak (died c. 524 or 528) was a proto-socialist Persian philosopher and/or religious reformer who gained influence under the reign of the Sassanian king Kavadh I. He was probably hanged and most of his followers were massacred by Khosrau I, Kavadh's son.For the source and more detailed information concerning this subject, click on the related links section (Answers.com) indicated below.
Jayasimha II died in 1042.
Svatopluk II died in 906.
Jagadhekamalla II died in 1151.
Sigebert II died in 613.
Óengus II died in 834.
Vigrahapala II died in 988.
Dobroslav II died in 1134.
Xicotencatl II died in 1521.
Shurapala II died in 1077.