The great grandmother of Jesus was a woman named Ismeria, according to Florentine medieval manuscripts analyzed by a historian. The legend of St. Ismeria, presented in the current Journal of Medieval History, sheds light on both the Biblical Virgin Mary's family and also on religious and cultural values of 14th-century Florence.

"I don't think any other woman is mentioned" as Mary's grandmother in the Bible, Catherine Lawless, author of the paper, told Discovery News. "Mary's patrilineal lineage is the only one given."

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