They are Madrigals and so are Grace and Hope Cahill. You find out in Book 7: The Viper's Nest.
They are definitely Madrigals.
Amy and Dan are part of the Cahill family, a secret society in The 39 Clues series. They belong to the Madrigal branch of the Cahill family, one of the most secretive and enigmatic branches.
Amy and Dan are Madrigals and are decended from MadelineCahill.
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, 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.
Their branch is....... madrigal (srry i wanted it to be dramatic) :D
Amy and Dan are Madrigals. The Madrigals decended from Madeline Cahill. Olivia Cahill (the original cahill) was pregnant with her when Olivia died. Madeline then decided to carry out her mother's wishes. Madrigals try to keep the other branches from finding all the 39 clues. Hope this helps! :)
Well, their grandma, Grace Cahill, was an Ekaterina Leader. If they're her grandchildren, they have to be Ekaterina too. Dan can't be a Tomas because Ekaterina is in his blood, along with Amy.
they are Madrigals. i read book 7 today!!!
i believe Amy and Dan are Madrigals.
Amy and Dan are Madrigals.