The 39 Clues Wiki
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The 39 Clues Wiki

Madeleine the Matriarch is the great-great-grandmother of Gideon Cahill. Her great-great-great-granddaughter, Madeleine Cahill, was named after her. She found the Cahill Island and was later given the island by Gaelic kings. Her grandson built Cahill Manor on Cahill Island. She is Amy and Dan's x26 great grandmother.

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