Athinganoi
The Athinganoi (Ancient Greek: Ἀθίγγανοι, singular Athinganos, Ἀθίγγανος, Atsinganoi/Atzigani) were a Manichaean sect and practiced some of the Jewish customs (which can be regarded as a form of Judaizing) who lived in Phrygia and Lycaonia but were neither Hebrews nor gentiles. They kept the Sabbath but were not circumcised.