On Aug. 29, 2018, a version of this profile was merged with one created by Private, and Jonathan chose the values he had for Last Name and Birth Surname, thus changing the Birth Surname from Medianowsky to Medianowsi, and the Last Name from Medianowsky to Levine
Today, Nov. 11, 2018, Private User changed the Last Name to Medianowsky and deleted her Birth Surname, changing it to blank.
Geni has both a Last Name Field and a Birth Surname Field, and the Last Name Field should be used for the Last Name a person used.
On the 1930 Census, Libby's husband is Head, and "Freda Madow" is listed as "Mother-in-law" - ie Libby's mother. This suggests "Madow" or whatever "Madow" may be an Americanization of was probably Libby's Birth Surname - do either of you, or anyone else, have any records to support what should be used as Birth Surname? (aside - Libby's mother used to be a Public Profile, now she and her husband are Private, so I cannot tell what if any evidence is given for their last name, ie for what should be Libby's birth surname)
On the 1930 Census, Libby has the Last Name "Levine". On her Gravestone, displayed as her Profile Photo, she has the Last Name "Levine".
I would think "Levine" should be in her Last Name field.