Claim: Agafia of Rus' father was Svyatoslav III Igorevich, a Rus' prince (a member of the Rurik dynasty).
Evidence: Agafia was the daughter of Svyatoslav III Igorevich and his wife Yaroslava Rurikovna, a daughter of prince Rurik Rostislavich of Belgorod. Svyatoslav III Igorevich (1176 – September 1211) was a Rus' prince (a member of the Rurik dynasty).