Mary S. Hefferon (born 1931)Hefferon family✓Confirmed how we know thisVitalsBorn1931✓Confirmed how we know thisFamilyFatherMichael Joseph Heffron (1895 to 1969)MotherAgnes Margaret Heffron (born Murphy) (1904 to 1972)Sources1950, ED 68-4, p.124, line 21View Mary S. Hefferon's family tree · See this person in the family network · Find how you are related