Martha Davis
The family sailed to America in 1862 on the ship John J. Boyd. The ship manifest shows their surname as "Griffiths, and they continued to Utah using that surname. This was John's mother's maiden name.
Her travel to Utah is mentioned in the obituary of her son Heber.
Her birth and death dates are confirmed by the inscription on her gravestone.
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Martha Davis (1824 - 1906) Profile