Simeon Lengvenis of Lithuania
Лугвений Ольгердович, Prince of Mistislavl, was born circa 1358 to Algirdas (1296-1377) and Uliana Aleksandrovna of Tver (c1325-1392) and died 19 June 1431 of unspecified causes. He married Anastasiya Dmitriyevna (c1378-c1430) 1406 JL . Charlemagne (747-814), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Hugh Capet (c940-996)/s, Rollo of Normandy (860-932)/s.
Simeon Lengvenis (Simeon Lingwen, born ca. 1358 – died 1431; Belarusian: Лугвен-Сымон, Łuhvien; Russian: Лугвений, Лугвен, Лугвень, Lugven(y), Polish: Lingwen Semen Olgierdowicz) was one of the sons of Algirdas, Grand Duke of Lithuania, and the ruler of Great Novgorod Republic (1389–1392, 1406–1411). He was known for his skills as a military leader.
Lengvenis was born to Algirdas and his second wife Uliana Alexandrovna of Tver. In 1387 battle with the State of the Teutonic Order Lengvenis commanded one of Lithuanian formations. In 1389–1392 he was appointed by his brother Jogaila, Grand Duke of Lithuania and King of Poland, as regent of Veliky Novgorod. He was baptized in the Orthodox rite as Simeon and received the title of Prince of Great Novgorod. After Lengvenis lost this title in 1392, Vytautas the Great appointed him to Mstislavl. In 1406–1411 Lengvenis, once again, was nominated by Vytautas as regent of Great Novgorod. As ruler of Novgorod he led battles against Pskov, Livonian Order, and Sweden.
In 1410, Lengvenis participated in the Battle of Grunwald and commanded three banners from Smolensk. His son Yury commanded one of these banners. In 1411 Lengvenis participated in the signing of the Peace of Thorn. He was married to Maria Dmitriyevna, princess of Moscow, the daughter of Dmitri Donskoy.
- Yuri Lugvenovich (c.1396-1460)
Mstislav (c.1398-?) From the second wife (from the autumn of 1406/1407), also the Moscow princess  , whose name and origin is not established (she could become one of the younger sisters of the first wife, Anna or the widowed Anastasia ), had a son:
- Yaroslav-Fyodor Lengvenaitis (1410-1435)
- (Lithuanian) Batūra, Romas (2005). "Lengvenis", Vytautas Spečiūnas (compiler) Gediminaičiai. Vilnius: Mokslo ir enciklopedijų leidybos institutas, 184. ISBN 5-420-01558-7
- (Lithuanian) Jučas, Mečislovas (1990). Žalgirio mūšis (Battle of Grunwald). Vilnius: Mokslas, 174. ISBN 5-420-00242-6.
| Grand Duke of Lithuania
Лугвений Ольгердович and Maria Dmitriyevna (c1376-1399)
|Yuri Lugvenovich of Mstislavl (c1396-1460)||1396||1460 Mstislavl, Mstsislau Rayon, Mahilyow Voblasts, Belarus|
|Mstislav Lugvenovich (c1398-c1399)|
Лугвений Ольгердович and Anastasiya Dmitriyevna (c1378-c1430)
|Yaroslav Fyodor Lengvenaitis (1410-1435)|
|DATE OF BIRTH||1398|
|PLACE OF BIRTH|
|DATE OF DEATH||1421|
|PLACE OF DEATH|
|Andrei Olgierdovich of Polotsk (1325-1399)||1325||12 August 1399|
|Dmitri Olgierdovich of Bryansk (c1330-1399)||1330||12 August 1399||Anna Ivanovna of Drutsk (c1335-c1375) |
Anna Aleksandrovna of Ryazan (c1328-c1390)
|Vladimir Olgierdovich of Kiev (c1330-1398)||1330||1398 Kiev, Ukraine||Anna NN|
|Konstantin Olgierdovich Chartorysky (c1332-c1388)||1332||1388|
|Fyodor Olgierdovich (c1333-1404)||1333||1404|
|Feodora Olgierdovna (c1336-c1375)||1336||1375||Svyatoslav Titovich Karachevsky (c1310-c176)|
|Agrypina Olgierdovna (c1337-1393)||1337||1375||Boris Konstantinovich of Suzdal (c1322-1394)|