Please read through [[God-Fearers_and_the_Identity_of_the_Sabians]] for more informaiton.
The word used in the [[Targum Onkelos]] to refer to Noahite [[Toshavim ]] is [[Muslamai]].
Those Muslamai (Toshavim) who wanted to go to the next level would take an oath of fealty in front of 3 Jews and be immersed in a Mivkah to become [[הגרים]].