Guillaume Beylier

Guillaume Beylier was a member of the French Brotherhood of Assassins during the later half of the 18th century. Around 1776, Beylier was contacted by Eseosa, an Assassin in the French colony of Saint-Domingue, to ask for support in their rebellion for independence. As they had their own problems brewing, Beylier was not able to provide reinforcements, but kept the line of communications open.

Reference

 * Assassin's Creed: Initiates - Letters to the Dead