Countess Eva Rzyszczewski 
Countess Eufemia Rzyszczewski 
Prince Ferdinand Radziwill 
Princess Maria Radziwill 
Prince Karol Radziwill 
Child of Prince Karol Radziwill and Countess Marie Josepha Zamoyska
- Prince Michael Radziwill+ b. 18 Apr 1907
Sandford Balfour1 
- [S8] BP1999 volume 1, page 174. See link for full details for this source. Hereinafter cited as. [S8]
Prince Michal Radziwill 
Children of Prince Michal Radziwill and Maria de Barnardakya
- Prince Antoni Radziwill b. 26 Sep 1899, d. 9 Jul 1920
- Princess Leontyna Radziwill+ b. 26 Sep 1904, d. 10 Jan 1995
Maria de Barnardakya 
Her married name became Radziwill.
Children of Maria de Barnardakya and Prince Michal Radziwill
- Prince Antoni Radziwill b. 26 Sep 1899, d. 9 Jul 1920
- Princess Leontyna Radziwill+ b. 26 Sep 1904, d. 10 Jan 1995
Joaquina Martinez de Medinilla 
Her married name became Radziwill.
Harriet McNab 
Her married name became Radziwill.
