Jill Lynn Rosenthal was 21 months old when she vanished from Atlantic City, New Jersey, around July 2, 1965. Born October 27, 1963, she was a twin; her brother Jack was found abandoned in a stroller outside a Newark department store about the same time and was long misidentified as Paul Fronczak. Jack later learned through DNA testing in 2012 that he was not the Fronczak child and eventually took the name Jack Rosenthal, discovering he had a twin sister who went missing as an infant.

The circumstances of Jill’s disappearance remain unclear. Her parents, Gilbert and Marie Rosenthal, are deceased and reportedly provided no definite explanation before their deaths. There are no known photographs of Jill; the National Center for Missing & Exploited Children prepared an age-progressed composite from family photos to help the search. If anyone has information about Jill’s whereabouts or remembers the Rosenthal family in the 1960s, please come forward.