The 39 Clues - Family branches

The four family branches were founded by the four children of Gideon and Olivia Cahill. Gideon was a student of alchemy, and died in a fire while trying to save his notes and research from that fire.

The four branches are Lucian, the Ekaterina, the Janus, and the Tomas.

Ekaterina (founded by Katherine Cahill)
The Ekats are famous scientists and great inventors

Janus (founded by Jane Cahill)
This branch has included some of the worlds most famous and talented artists

Lucian (founded by Luke Cahill)
Some of the world's greatest leaders and spies, were Lucians.

Tomas (founded by Thomas Cahil)
The Tomas are famous explorers, discoverers, and athletes.

39 clues

39 clues is an adventure/scavenger hunt series about two siblings , Amy and Dan. When their grandmother passes away they are given the choice between 1 million dollars and a clue to a 'treasure'. The Cahill family is huge, and some of the other participants at the funeral choose to start on the search for the 39 clues that will lead to X. There are 6 other teams that Dan and Amy must compete against.