Statistics for occurrence #1 of “Mary Joanna” in chapter 8 of Historic leaves, volume 8, April, 1909 - January, 1910:

... Mary Joanna
Charles Darwin Elliot, son of Joseph and Zenora (Tucker) Elliot, was born in Foxboro, Mass., June 20, 1837. Among Mr...
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Mary Joanna 4 4 0 0 0 user votes
Mary Joanna Elliot 4 4 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.