By the time of Christ, the Greeks also called Chaldeans who practiced astrology as Magi too. Many astrologers traveled west to teach, including the Babylonian Berossus, who taught on the Greek island of Cos after 281 B.C. Tacitus says the magi practiced sorcery, and Pliny claims magic started with Zoroaster. The early church writer Origen, among his many criticisms of the heretic Celsus, said Celsus failed to distinguish between the Magi and the Chaldeans in Origen Against Celsus book 1 ch.58 p.422. The New International Dictionary of the Bible p.612 mentions these as the Magi.
Wakati wa Kristo, Wagiriki pia waliwaita Wakaldayo waliofanya unajimu ‘mamajusi.’ Wanajimu wengi walisafiri kuelekea upande wa magharibi kufundisha watu mbalimbali ikiwamo Waberosu wa Kibabeli, waliofundisha kwenye kisiwa cha Cos baada ya mwaka 281 KK. Tacitus anasema mamajusi walifanya uchawi, na Pliny anadai kuwa mazingaombwe/uchawi ulianzishwa na Zoroaster. Origen, mwandishi wa kanisa la mwanzo, alimkosoa mzushi Celsus katika vitu vingi ikiwemo kushindwa kwake kutofautisha kati ya mamajusi na Wakaldayo kwenye Origen Against Celsus kitabu cha 1 sura ya 58, uk.422.