The twin of her brother John as their ages are identical on the 1920 census (down the to month). Confirmed via Massachusetts birth index and death confirmed via death index.
The twin of her brother John as their ages are identical on the 1920 census (down the to month). Confirmed via Massachusetts birth index and death confirmed via death index.
| 18 Jun 1916 – | Mary F. Hagenbuch born |
| 1923 – | Mary F. Hagenbuch died in Boston, Massachusetts, United States |
| 1925 – | Mary F. Hagenbuch buried |