| Honorific Prefix: | His Serene Highness |
| Hieronim Mikołaj Radziwiłł | |
| Prince Radziwiłł | |
| Full Name: | Hieronim Mikołaj Melchior Konstanty Dominik Maria ks. Radziwiłł na Nieświeżu h. Trąby |
| Birth Date: | 6 January 1885 |
| Birth Place: | Cannes, France |
| Death Place: | Gulag, near Luhansk, Soviet Union |
| House-Type: | Szlachta |
| Noble Family: | Radziwiłł |
| Father: | Dominik Maria Radziwiłł |
| Mother: | María Dolores de Agramonte y Zayas-Zamudio |
| Spouse: | |
| Issue: | Princess Maria Teresa Radziwiłł Prince Dominic Rainer Radziwiłł Prince Karol Jerome Radziwiłł Prince Albert Radziwiłł Princess Eleonore Radziwiłł Prince Leon Jerome Radziwiłł |
Prince Hieronim Mikołaj Radziwiłł (6 January 1885 – 6 April 1945) was a Polish nobleman, landlord in Balice. Radziwiłł was a great-grandson of Prince Maciej Radziwiłł. He and his children carried the style of Serene Highness.
Hieronim Mikołaj "Jerome" Radziwiłł was born on 6 January 1885 at Cannes in France. He was a son of Prince Dominik Maria Radziwiłł (1852–1938) and Doña María Dolores de Agramonte y Zayas-Zamudio (1854–1920). Among his siblings were Princess Dolores Radziwiłł, and Princess Isabella Radziwiłł.[1]
His paternal grandparents were Konstanty Radziwiłł and Adela Karnitska (a descendant of Justynian Szczytt).[2] He was a great-grandson of Prince Maciej Radziwiłł.[3] His maternal grandparents were Francisco de Agramonte Cortijo and María de los Dolores de la Torre Dolores de Agramonte, natives of Santiago de Cuba where they were large landowners.[4] [5]
He graduated from the gymnasium in Feldkirch before he began studying law at the Jagiellonian University in 1904. He later moved to the Agricultural College at the university.
In between the World Wars, he was primarily involved in agriculture, breeding and forestry on his Balice estate which had been built by his father.[6] He owned shares in a company producing glass and clay products. Although he was not involved in politics, he was an honorary member of the Supreme Council of the Party of National Monarchists.
During World War II, he was involved in the underground activity of the "Uprawa" gentry organization, which provided funding and food for the Home Army. He was arrested by the Soviet authorities in February 1945 and deported, along with 2,000 prisoners, to a NKVD Gulag labor camp during the Soviet occupation of Poland,[7] where he died shortly after his arrival.
On 16 January 1909, Prince Radziwiłł married Archduchess Renata of Austria (1888–1935) in Żywiec. Renata was a daughter of Archduchess Maria Theresa of Austria, Princess of Tuscany and Archduke Charles Stephen of Austria. A first cousin of King Alphonso XIII of Spain, she was a member of the Teschen branch of the House of Habsburg-Lorraine. Upon her marriage to Prince Radziwiłł in 1909, she renounced her titles as Archduchess of Austria and Princess of Bohemia, Hungary, and Tuscany.[8] Before her death on 9 December 1935, they were the parents of six children:[9]
After the death of his first wife, the Prince remarried to his cousin, Princess Jadwiga Aniela Radziwiłł in January 1937.[14]
Prince Radziwiłł died at the Gulag, near Luhansk on 6 April 1945. He was buried in a wooden coffin in the steppe near the labor camp.
Through his eldest son's first marriage to Princess Eugénie, he was a grandfather of Princess Tatiana Radziwiłł (b. 1939), who married Dr. Jean Henri Fruchaud in 1966,[15] and Prince George Radziwiłł (1942–2001). Through his eldest son's second marriage to Lidia, he was posthumously grandfather of Princess Renata Radziwiłł (1954–2014), who married Swiss banker André Wagnière in 1976,[16] Princess Louise Radziwiłł (b. 1956), who married Sicilian aristocrat Don Antonio Moncada, Nobile dei Principi of Paternò in 1987, and Princess Lyda Radziwiłł (b. 1959), who married Roman aristocrat Prince Innocenzo Odescalchi in 1991.
Through her daughter Eleonore's second marriage, he was posthumously a grandfather of Remy de Froidcourt (b. 1960).[17]