Observant Noahites are known in the Torah as הגרים ('''Hagarim''' or '''Ha-Garim''' or '''Ha-Gerim''' or ''' Ha-Geirim''' meaning '''The Gers''' or '''The Pilgrims''' or '''The Migrants''') . They are children of Noah who honour the G-d of Abraham Isaac and Jacob. They are called '''Muslamai''' in the Targum of Rabbi Onkelos. Augustus Caesar was a an observant Noahite. Judeo-Arabic scriptures refer to them as משלם.
The word "Hagar" is the epithet given to Keturah which was changed in an attempt to distinguish Hagar from Keturah by the Karaites around 1000 years ago when the Karaites inserted the Nikudot into the Masoretic text. Keturah came from Hagarim (Noahites) so Hagarim are not physical descendants of Keturah.