They are Madrigals descended from Madeline Cahill through Grace and Hope Cahill.
In the book THE VIPER'S NEST it reveals the Dan and Amy are Madrigals.
In Book Seven: The Viper's Nest: Amy and Dan Cahill figure out they are Madrigals
They are Madrigals. It comes from Grace and Hope's side of the family. Amy and Dan learn this in Viper's Nest, Book7.
Amy and Dan are Madrigals and are decended from MadelineCahill.
i believe Amy and Dan are Madrigals.
Amy and Dan are Madrigals.
it is ekat branch!same with Amy.
They are Madrigals and so are Grace and Hope Cahill. You find out in Book 7: The Viper's Nest.
Amy and Dan Cahill are part of the Ekaterina branch in the 39 Clues series. The Ekaterina branch is known for their intelligence and passion for knowledge.
They are definitely Madrigals.
In the vipers nest(book 8) they went to South Africa the find a clue related to Winston Churchill and Shaka Zulu,Aloe
Amy and dan are madrigals, the man in black is their great-uncle, fiske cahill, Nallie is a madrigal too, and Fiske and nellie are the new legal guardians of Amy and dan.