Svyatoslav was the son of unknown parents. The date and place of his birth have not been found.
His wife was Feodora Jagiełłonka, who he married in AFT 1376. The place has not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | prince of Karachev and Zwenigorod |