Jean a Lasco led a group of these people to England, attracted by a charter issued by Edward VI.  
Jean a Lasco led a group of these people to England, attracted by a charter issued by Edward VI.  Several of these people were killed in the Massacre of Vassy, which preceded the Edict of Amboise.  These people were promised exemption from military service and taxation via the Edict of Potsdam, and were massacred after an assassination attempt on Gaspard de Coligny.   Henry IV granted them certain freedoms in the Edict of Nantes.  For 10 points, name this group of French protestants.
Jean a Lasco led a group of these people to England, attracted by a charter issued by Edward VI.  
{Huguenots} [accept {French Protestants} before the end of the question]