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| Ostrogski | |
|---|---|
Ostrogski (variation) | |
| Place of origin | Ostroh |
| Members | Daniil Ostrogski Feodor Ostrogski Konstanty Ostrogski |
| Connected families | Zasławski,Ostrozhetsky |
| Estate(s) | Ostroh Castle Dubno Castle Starozaslavsky Castle Starokostiantyniv Castle Stare Selo Castle Ostrogski Palace |

TheHouse of Ostrogski (Polish:Ostrogscy;Lithuanian:Ostrogiškiai;Ukrainian:Острозькі,romanized: Ostroz'ki) was one of the more prominent families in theKingdom of Poland, theGrand Duchy of Lithuania and in thePolish–Lithuanian Commonwealth.[1][2][3] The family spanned from the 14th centuryRuthenian nobleDaniil Ostrogski to the 17th century Polish members. After the death ofJanusz Ostrogski, the last male heir, most of the family's possessions passed to theZasławski family.
The family played a crucial role in preserving theEastern Orthodoxy, particularly during theUnion of Brest signing in 1595. Members contributed to printing books inChurch Slavonic (Kyiv [Ruthenian] recession)[4] and supporting theOrthodox brotherhoods. By the 17th century almost all members turn to Catholicism and became fully associated with the Polish nation (Polonization). Many of their possessions were passed on or inherited by members ofSanguszko family.

The Ostrogski family was most likely ofRurikid stock and descended fromSviatopolk II of Kiev. Some scholars however claim that their descent is from theGalicia-Volhynia line of the Rurikid dynasty. Vasilko Romanovich (c.1256-1282), Prince ofSlonim, may have been the grandfather of PrinceDaniel Ostrogski.[5] The probable progenitor of this family was Prince Danylo Dmytrovych (or Danylo Wasilijewicz), who receivedOstroh fromLiubartas, son ofGrand Duke of LithuaniaGediminas. His son, Prince Feodor Danilovich Ostrogski, was a supporter of KingJagiello, who in 1386 confirmed him in possession of theOstroh Castle and appointedgovernor ofVolhynia in 1387.[6] In addition to Ostrog Feodor Danilovich Ostrogski became owner ofKorets, Zaslav (Izyaslav, in presentKhmelnytskyi Oblast, Ukraine), and other towns. In some chronicles Feodor is calledDux Fethko de Ostrog.[7]Their dominions inVolynia,Galicia, andPodolia included 24 towns, 10 townlets, and more than 100 villages.

The most notable among Feodor's descendants wasGrand Hetman of Lithuania, PrinceKonstanty Ostrogski, who defeatedMuscovy in theBattle of Orsha (1514) and his sonKonstanty Wasyl Ostrogski (orKonstantin Konstantinovich Ostrozhski). Unlike other Ruthenian magnates, the Ostrogskis refused to give upEastern Orthodoxy forRoman Catholicism despite the cultural pressure that led toPolonization ofRuthenian nobility. For several generations the Ostrogskis supported the religion of their forefathers, by opening schools, printing books inRuthenian language withCyrillic such as "Ostrog Bible" (written byIvan Fedorov) and making a generous charitable contributions to the construction of the Orthodox churches in the region.
The last male member of the family wasJanusz Ostrogski (d. 1620); the last female wasAnna Alojza Ostrogska (1600–54), married to Grand HetmanJan Karol Chodkiewicz. When a junior line of the family (princesZasławski or Zasławski-Ostrogowski) which inherited the Ostrogoski fortune became extinct in 1682 (with the death ofAleksander Janusz Zasławski), their huge possessions passed to theLubomirski family (due to their marriage with Aleksander sister,Teofilia Ludwika Zasławska) and other families of Polishszlachta. A complicated litigation concerning the Ostrogski inheritance continued until theRussian Empire annexed Poland during thePartitions.

| Daniel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| George d. ~ 1377 | Theodore ~ 1410 | Agatha | Michael d. 1399 | Demetrius d. 1399 | Anastasia | Alexander (Olexa) d. 1388 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Theodor (Frederik) | Basileus the Red d. 1461 | Hanka (Agatha) | Dashko d. 1420 | Andrew (Andrushko) d. after 1436 | Mytko d. 1442 | Anastasia | Theodora-Anna | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Vaclav (Frederik) d. 1460 | John d. after 1465 | Maria | George d. 1530 | Agrippine | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Tetiana | Constantine d. 1530 | Alexandra | Michael d. 1501 | Maria | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Beata 1510-1539 | Elijah 1510-1539 | Constantine Basileus 1526-1608 | Sophia | Sophia-Mavra d. after 1561 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Elizabeth (Halshka) 1539-1582 | Alexander 1570-1603 | Anna 1575-1635 | Catherine 1560-1579 | Elizabeth d. 1599 | Constantine d. 1588 | Suzanna | Janusz 1554-1620 | Theophilia | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Alexander d. 1607 | Adam Constantine 1597-1618 | Christof d. 1606 | Janusz Paul 1598-1619 | Anna Aloise 1600-1654 | Basileus d. 1605 | Catherine 1602-1642 | Sophia 1595-1622 | Eleonora d. 1618 | Euphrosina d. 1628 | John-Volodymyr 1617-1618 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||