Lengvenis
| Lengvenis | |
|---|---|
Seal of Lengvenis, dating to 1379 | |
| Prince of Novgorod | |
| Reign | 1389–1392, 1406–1411 |
| Predecessor | Dmitry Donskoy |
| Successor | Vasily III Dmitriyevich |
| Prince of Mstsislaw | |
| Reign | 1392–1431 |
| Predecessor | Karigaila |
| Born | c. 1360 |
| Died | after 19 June 1431 |
| Spouse | Maria Dmitrovna |
| Dynasty | Gediminid |
| Father | Algirdas |
| Mother | Uliana of Tver |
Lengvenis (c. 1360 – after 19 June 1431) was one of the sons of Algirdas, Grand Duke of Lithuania, who was the prince of Novgorod (1389–1392; 1406–1411). He was one of the most famous commanders of Vytautas the Great. He was baptized in the Eastern Orthodox rite as Semën to be titled the prince of Novgorod.