Yaroslav Aleksandrovich of Ryazan, Prince of Pronsk, Grand Prince of Ryazan, was born 1318 to Aleksandr Mikhailovich of Pronsk (c1295-1340) .
Siblings
| Name | Birth | Death | Joined with |
| Ivan Aleksandrovich of Ryazan (c1315-1351) | |||
| Yaroslav Aleksandrovich of Ryazan (c1318-1344) | 1318 | ||
| Vasili Aleksandrovich of Ryazan (c1320-1351) | |||
| Anna Aleksandrovna of Ryazan (c1328-c1380) | |||