Mary O'Connor (born 1890)O'Connor family✓Confirmed how we know thisVitalsBorn1890✓Confirmed how we know thisFamilyFatherWilliam Francis Costello (1858 to 1917)MotherElizabeth Costello (born 1868)Sources1900, ED 85, p.85, line 03View Mary O'Connor's family tree · See this person in the family network · Find how you are related