Leopold Abraham Maria, Count von Nostitz-Rieneck was born 8 July 1865 in Štiřín Castle, Kamenice, Prague-East District, Central Bohemian Region, Czech Republic to Friedrich Maria, Count von Nostitz-Rieneck (1835-1866) and Theresia "Sitta", Countess von Thun und Hohenstein (1837-1908) and died 5 October 1945 Perglas, Sokolov District, Karlovy Vary Region, Czech Republic of unspecified causes. He married Karolina Chotková von Chotkov und Vojnín (1865-1919) 2 October 1886 in Prague, Czech Republic. He married Henriette Chotková von Chotkov und Vojnín (1880-1964) 1 March 1921 in Chlum Svaté Maří, Sokolov District, Karlovy Vary Region, Czech Republic.
Children
| Name | Birth | Death | Joined with |
| Erwin Hartwig, Count von Nostitz-Rieneck (1887-1942) | |||
| Franz Anton, 1890-Count von Nostitz-Rieneck (1888-1956) | |||
| Wolfgang Hubert, Count von Nostitz-Rieneck (1890-1952) | |||
| Herman Agidius, Count von Nostitz-Rieneck (1892-1941) | |||
| Frederik Karel, Count von Nostitz-Rieneck (1900-1976) | |||
| Name | Birth | Death | Joined with |
| Carolina Maria Johanna Huberta von Nostitz-Rieneck (1923-2005) | |||
Siblings