No obituary seems to be available (SN, 2022). The college record is as follows:

Ms. Ellen P. Rosenzweig
Birth Name: Ellen A Pfaffmann
Deceased Date: 01/07/19          Reunion Class(es): 1963

Last Address Brooklyn, NY

Relations...:
Rosenzweig, Laurence - Widower
 - Source: RLA

Employment
   Employer                       Start Date End Date  Position
   ------------------------------ ---------- --------- ------------------------
   Wilkie Farr & Gallagher LLP    01/01/79   01/06/19  Assoc/Atty
   New York City Public Schools   01/01/66   12/31/72  Teacher
   Singes Hutner Levine & Seeman                       Attorney
   Peace Corps                                         Peace Corps Volunteer

Education
   Institution                                             Degree     Date Rcvd
   ------------------------------------------------------- ---------- ---------
   Mount Holyoke College                                   AB         06/01/63
   Brooklyn College - CUNY                                 JD         05/01/77
   Columbia University                                     MA         08/01/66