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 ordynat
Jan Jerzy Radziwiłł, II ordynat, son of the previous
Albrecht Władysław Radziwiłł, III ordynat, son of the previous
Zygmunt Karol Radziwiłł, IV ordynat, brother of the previous
Aleksander Ludwik Radziwiłł, V ordynat, brother of the previous
Michał Kazimierz Radziwiłł, VI ordynat, son of the previous
Jerzy Józef Radziwiłł, VII ordynat, son of the previous
Karol Stanisław Radziwiłł, VIII ordynat, brother of the previous
Michał Kazimierz "Rybeńko" Radziwiłł, IX ordynat, son of the previous
Karol Stanisław "Panie Kochanku" Radziwiłł, X ordynat, son of the previous
Dominik Hieronim Radziwiłł, XI ordynat, nephew of the previous
Antoni Henryk Radziwiłł, XII ordynat, distant cousin
Wilhelm Radziwiłł, XIII ordynat, son of the previous
Antoni Wilhelm Radziwiłł, XIV ordynat, son of the previous
Jerzy Fryderyk Radziwiłł, XV ordynat, son of the previous
Albrecht Antoni Wilhelm Radziwiłł, XVI ordynat, son of the previous
Leon Władysław Radziwiłł, XVII ordynat, brother of the previous, the last ordynat
Albrecht Radziwiłł, I ordynat
Jan Albrycht Radziwiłł, II ordynat, son of the previous
Jan Władysław Radziwiłł, III ordynat, son of the previous
Michał Karol Radziwiłł, IV ordynat, son of the previous
Stanisław Kazimierz Radziwiłł, V ordynat, son of the previous
Dominik Mikołaj Radziwiłł VI ordynat, distant cousin
Jan Mikołaj Radziwiłł, VII ordynat, son of the previous
Marcin Mikołaj Radziwiłł, VIII ordynat, son of the previous
Józef Mikołaj Radziwiłł, IX ordynat, son of the previous
Michał Hieronim Radziwiłł, X ordynat, son of the previous
Ludwik Mikołaj Radziwiłł, XI ordynat, son of the previous
Leon Radziwiłł, XII ordynat, son of the previous
Jerzy Fryderyk Radziwiłł, XIII ordynat, cousin of the previous
Albrecht Antoni Wilhelm Radziwiłł, XIV ordynat, son of the previous
Leon Władysław Radziwiłł, XV ordynat, brother of the previous
Stanisław Radziwiłł, I ordynat
Mikołaj Krzysztof Radziwiłł, II ordynat, son of the previous
Albrecht Stanisław Radziwiłł, III ordynat, brother of the previous
Michał Kazimierz Radziwiłł, IV ordynat, cousin of the previous
Michał Kazimierz "Rybeńko" Radziwiłł, VII ordynat, son of the previous
Karol Stanisław "Panie Kochanku" Radziwiłł, VIII ordynat, son of the previous
Dominik Hieronim Radziwiłł, IX ordynat, nephew of the previous
Antoni Henryk Radziwiłł, X ordynat, distant cousin
Bogusław Fryderyk Radziwiłł, XI ordynat, son of the previous
Ferdynand Radziwiłł, XII ordynat, son of the previous
Janusz Franciszek Radziwiłł, XIII ordynat, son of the previous
Edmund Ferdynand Radziwiłł, XIV ordynat, third son of the previous
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