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Maria Teresa Zamoyska was born 18 July 1938 in Bratislava, Slovakia to Jan Kanty Zamoyski h. Jelita (1900-1961) and Isabella Alfonsa di Borbone delle Due Sicilie (1904-1985) .
Siblings
| Name | Birth | Death | Joined with |
| Karol Alfons Zamoyski (1930-1979) | 28 October 1930 Budapest, Hungary | 26 October 1979 Seville, Province of Seville, Andalusia, Spain | Esperanza Rey Luque (1935-) |
| Maria Krystyna Zamoyska (1932-1959) | 6 February 1932 Budapest, Hungary | 12 June 1959 Madrid, Spain | |
| Józef Michal Zamoyski (1935-) | 27 July 1935 Neuilly-sur-Seine, Hauts-de-Seine, Île-de-France, France | Maria Antonia Navarro y Gonzalez (1935-) | |
| Maria Teresa Zamoyska (1938-) | 18 July 1938 Bratislava, Slovakia | ||