Mary died in 1945 from complications of a burst appendix. She was only 12 years 9 months and 9 days old.
Find A Grave, database and images (https://www.findagrave.com : accessed 17 September 2018), memorial page for Mary Elizabeth Hunt (16 Feb 1933–27 Nov 1945), Find A Grave: Memorial #140357899, citing Saint Marys-Saint Patricks Cemetery, Violet Hill, York County, Pennsylvania, USA ; Maintained by Scott Hunt (contributor 47925303).
It may be possible to confirm family relationships with Mary by comparing test results with other carriers of her ancestors' mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line: