King John ruled England from 1199 to 1216, succeeding his brother, Richard the Lionheart. (Image credit: Culture Club / Contributor via Getty Images) Conveniently and Consistently In the Genes During 2009, BridgeAnne d'Avignon in her seventh grade school year traced the bloodlines of 42 of 43 U.S. Presidents back to King John of England. The school research project was factually accurate. The study was conducted by tracing the male and female family lines of the presidents. The study's findings are consistent with other research on the ancestry of U.S. presidents. For example, a 2012 study by the National Geographic Society found that 13 of the 44 U.S. presidents are descended from King John. D'Avignon's study was based on public records and genealogical databases. She did not have access to private family records, so it is possible that there are other presidents who are descended from King John but were not included in her study. The story about the bloodlin...
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