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In page Baroness Mary Vetsera:

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Marie Alexandrine Mary Freiin von Vetsera was born on 19 March 1871 as the third child and second daughter of Albin Freiherr von Vetsera (1825–1887), an Austrian diplomat from Pozsony, Kingdom of Hungary (present day Bratislava, Slovakia),[1] and his wife, born Eleni Hélène Baltazzi (1847–1925), member of a wealthy noble family from Chios, Greece (then part of the Ottoman Empire).[2][3] Albin Vetsera had been the guardian of the orphaned Baltazzi children and married the eldest daughter. He was raised to the rank of Freiherr in 1870 by Emperor Franz Joseph.[4][5] Mary had three siblings, Ladislaus "Laci" (1865–1881), Johanna "Hanna" (1868–1901), and Franz Albin "Fery" (1872–1915).[citation needed]