Man is Aron's uncle Misha, his mother's brother. Woman may be his aunt Tosha or his first wife who was murdered by the Nazis in the Holocaust.
This may be either Misha as a toddler or Misha's son from his first wife; if this is Misha's son, then he probably died in the Holocaust.
Possibly Aron's aunt and uncle. Unclear of the relationship to Aron or location.