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Yevstafi Konstantinovich was born 1242 to Konstantin Vladimirovich of Pronsk (c1187-c1242) and died 1264 of Killed in battle.
Yevstafi Konstantinovich (c1242-1264) is the son of Konstantin Vladimirovich of Pronsk (c1187-c1242). He lived in Lithuania and supported Daumantas of Pskov (c1240-1299) in his fight with Mindaugas.
When Vaišvilkas, the eldest son of Mindaugas, entered into an alliance with Shvarn Prince of Halych-Volhynia in 1264, he was able to defeat Daumantas. Yevstafi Konstantinovich was killed in battle while Daumantas and his followers fled to Pskov.
Siblings
| Name | Birth | Death | Joined with |
| Yevstafi Konstantinovich (c1242-1264) | 1242 | 1264 | |
Residences
Footnotes (including sources)