Mandaeism
Other groups which have been identified with the Mandaeans include the "Nasoraeans", described by Epiphanius, and the Dositheans, mentioned by Theodore Bar Kōnī in his Scholion.  Ibn al-Nadim also mentions a group called the Mughtasila, "the self-ablutionists," who may be identified with one or the other of these groups.  The members of this sect, like the Mandaeans, wore white and performed baptisms.