{geni:about_me} Birthdate is found in ''Geburtstags Merkbuch / Birthday Book'' of Ernestine Reif Schlesinger, in possession of Janet Lindner, ERS's great-grandaughter. Entry by Ernestine Reif Schlesinger (Hedi's aunt).

Birth year also found at genteam.at ''Index of the Jewish Records of Vienna'':

* Numerative #[https://familysearch.org/pal:/MM9.3.1/TH-1942-2579...=MMGD-27P:n416713783 350], Volume: Wien
* Reif, Hedwig
* Parents Moriz/Strakosch Bertha
* "Place of Birth Residence [Wohnung] of Parents: Wien I, [https://maps.google.com/maps?q=Deutschmeisterplatz...ria&t=m&z=16 Deutschmeisterplatz 4]

Married, per genteam.at:
* Year 1913, Num 37 Stadttempel
* Last Name Schwarz First Name Ernst H.
* Last Name Reif First Name Hedwig

Death date is per obituary in the September 13, 1968 edition of the ''New York Times":

"''De Marxov--Hedvig''. Suddenly, on Thursday, September 12. Beloved wife of Paul de Marxov, devoted mother of Mrs. Aline Wetter."