Amy and Dan are siblings. Amy loves Dan as a sibling and a brother.
In Book Seven: The Viper's Nest: Amy and Dan Cahill figure out they are Madrigals
Dan Cahill that is his real name.
yes because we (the people typing here) are cahills. we are amy, heavely and dan.
i believe Amy and Dan are Madrigals.
Dan Cahill's real name is Daniel Arthur Cahill.
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.
In the book THE VIPER'S NEST it reveals the Dan and Amy are Madrigals.
Ashley Jackson will play Amy Cahill. Adam Hicks will play Dan Cahill.
Hope Cahill and Arthur Trent
Amy Cahill is a fictional character from "The 39 Clues" book series. The character was created by author Rick Riordan and is not a real person.
yes heavely cahill is real because heavely cahill is me, typing here. i'm 15 and i'm a older sister of dan(he's 13) and younger sister of amy(she's 16)