Radziwiłł Family Fee Tail (Polish: Ordynacja Radziwiłłów) was a fee tail established in the Polish-Lithuanian Commonwealth and owned by the Radziwiłł family.
Three family fee tail estates were established on the basis of an agreement between the three sons of Mikołaj Czarny Radziwiłł on August 16, 1586 in Grodno. The "Nieśwież Fee Tail" (Ordynacja Nieświeska), "Ołyka Fee Tail" (Ordynacja Ołycka) and "Kleck Fee Tail" (Ordynacja Klecka). It was approved by the Sejm in 1589. Ordynat was the title of the principal heir of the Ordynacja.
The family fee tail existed in partitioned Poland and the Second Republic of Poland until the end of World War Two. The last ordynat was Prince Leon Władysław Radziwiłł (1888-1956).
Mikołaj Krzysztof "Sierotka" Radziwiłł, I ordynatJan Jerzy Radziwiłł, II ordynat, son of the previousAlbrecht Władysław Radziwiłł, III ordynat, son of the previousZygmunt Karol Radziwiłł, IV ordynat, brother of the previousAleksander Ludwik Radziwiłł, V ordynat, brother of the previousMichał Kazimierz Radziwiłł, VI ordynat, son of the previousJerzy Józef Radziwiłł, VII ordynat, son of the previousKarol Stanisław Radziwiłł, VIII ordynat, brother of the previousMichał Kazimierz "Rybeńko" Radziwiłł, IX ordynat, son of the previousKarol Stanisław "Panie Kochanku" Radziwiłł, X ordynat, son of the previousDominik Hieronim Radziwiłł, XI ordynat, nephew of the previousAntoni Henryk Radziwiłł, XII ordynat, distant cousinWilhelm Radziwiłł, XIII ordynat, son of the previousAntoni Wilhelm Radziwiłł, XIV ordynat, son of the previousJerzy Fryderyk Radziwiłł, XV ordynat, son of the previousAlbrecht Antoni Wilhelm Radziwiłł, XVI ordynat, son of the previousLeon Władysław Radziwiłł, XVII ordynat, brother of the previous, the last ordynatAlbrecht Radziwiłł, I ordynatJan Albrycht Radziwiłł, II ordynat, son of the previousJan Władysław Radziwiłł, III ordynat, son of the previousMichał Karol Radziwiłł, IV ordynat, son of the previousStanisław Kazimierz Radziwiłł, V ordynat, son of the previousDominik Mikołaj Radziwiłł VI ordynat, distant cousinJan Mikołaj Radziwiłł, VII ordynat, son of the previousMarcin Mikołaj Radziwiłł, VIII ordynat, son of the previousJózef Mikołaj Radziwiłł, IX ordynat, son of the previousMichał Hieronim Radziwiłł, X ordynat, son of the previousLudwik Mikołaj Radziwiłł, XI ordynat, son of the previousLeon Radziwiłł, XII ordynat, son of the previousJerzy Fryderyk Radziwiłł, XIII ordynat, cousin of the previousAlbrecht Antoni Wilhelm Radziwiłł, XIV ordynat, son of the previousLeon Władysław Radziwiłł, XV ordynat, brother of the previousStanisław Radziwiłł, I ordynatMikołaj Krzysztof Radziwiłł, II ordynat, son of the previousAlbrecht Stanisław Radziwiłł, III ordynat, brother of the previousMichał Kazimierz Radziwiłł, IV ordynat, cousin of the previousMichał Kazimierz "Rybeńko" Radziwiłł, VII ordynat, son of the previousKarol Stanisław "Panie Kochanku" Radziwiłł, VIII ordynat, son of the previousDominik Hieronim Radziwiłł, IX ordynat, nephew of the previousAntoni Henryk Radziwiłł, X ordynat, distant cousinBogusław Fryderyk Radziwiłł, XI ordynat, son of the previousFerdynand Radziwiłł, XII ordynat, son of the previousJanusz Franciszek Radziwiłł, XIII ordynat, son of the previousEdmund Ferdynand Radziwiłł, XIV ordynat, third son of the previousRadziwiłł Family Fee Tail Wikipedia (Text) CC BY-SA