Prince Charles Ferdinand Radziwill
Children of Prince Charles Ferdinand Radziwill and Katarzyna Kleniewska
- Prince Jan Radziwill1 b. 27 Oct 1993
- Princess Karolina-Anna Radziwill1 b. 13 May 1997
- Prince Dominik Radziwill1 b. 15 May 2001
Katarzyna Kleniewska
Her married name became Radziwill.
Children of Katarzyna Kleniewska and Prince Charles Ferdinand Radziwill
- Prince Jan Radziwill1 b. 27 Oct 1993
- Princess Karolina-Anna Radziwill1 b. 13 May 1997
- Prince Dominik Radziwill1 b. 15 May 2001
Princess Anna Maria Radziwill
Children of Princess Anna Maria Radziwill and Prince Maciej Radziwill
- Princess Izabella Radziwill1 b. 30 Mar 1991
- Princess Aleksandra Radziwill1 b. 18 Jan 1993
- Princess Helena Radziwill1 b. 19 Dec 1994
- Prince Maciej Radziwill1 b. 9 Jun 1998
- Prince Konstanty Radziwill1 b. 21 Jun 2002
Princess Isabella Radziwill
From 18 June 1988, her married name became Dembinski.1
Children of Princess Isabella Radziwill and Ignacy Dembinski
- Mikolaj Dembinski1 b. 14 Mar 1990
- Piotr Dembinski1 b. 14 Aug 1992
- Stanislaw Dembinski1 b. 3 Apr 1994, d. 4 Dec 1997
- Jan Dembinski1 b. 23 Feb 1996
- Ignacy Dembinski1 b. 11 Jul 1998
Princess Theresa Margareta Radziwill
From 7 August 1997, her married name became Stankowski.1 From 8 September 2007, her married name became Tarnoswki.1
Princess Krystyna Radziwill1
Her married name became Milewska.
Children of Princess Krystyna Radziwill and Jan Milewski
- [S5385] Stanislas Dwernicki, “re: Radziwill Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 May 2011. Hereinafter cited as “re: Radziwill Family.”
Jan Milewski
Children of Jan Milewski and Princess Krystyna Radziwill
- [S5385] Stanislas Dwernicki, “re: Radziwill Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 May 2011. Hereinafter cited as “re: Radziwill Family.”
Prince Leon Radziwill 
Children of Prince Leon Radziwill and Baroness Olga de Simolin-Wettberg
- Prince Anton Radziwill b. 8 Oct 1912, d. 7 Mar 1967
- Prince Jerzy Mikolaj Radziwill, XIX Ordynat Nieswiez+ b. 20 Jun 1921, d. 9 Apr 2007
Baroness Olga de Simolin-Wettberg 
Her married name became Radziwill.
Children of Baroness Olga de Simolin-Wettberg and Prince Leon Radziwill
- Prince Anton Radziwill b. 8 Oct 1912, d. 7 Mar 1967
- Prince Jerzy Mikolaj Radziwill, XIX Ordynat Nieswiez+ b. 20 Jun 1921, d. 9 Apr 2007
Prince Anton Radziwill 