Around the 11th century, groups speaking an Indo-Aryan language moved west out of northwestern India on horses and horse-drawn wagons β a horse people, with horse trades, horse music, and horse-borne crafts. Linguistics, not legend, tells us this: Romani is a sister of Hindi and Punjabi, shaped further by long sojourns in Persian and Armenian lands before it ever touched Europe.
When they reached the Byzantine Empire, the Christian East had no settled category for them. Monks and canonists reached for the closest name they had β Athinganoi β a label that already belonged to an older heretical sect in Asia Minor accused of sorcery, fortune-telling, and forbidden practices. The new arrivals carried serpent-charming, divination, and a way of life that fit the old slur well enough that it stuck. From Athinganoi came the international Acigani, and from there Tsigani, CigΓ‘n, Θigan, Zigeuner, Cigano.
What followed is a slow story, not a tidy one. Across centuries among Orthodox peoples β Greek, Bulgarian, Serbian, Romanian, Slavic β the Roma did not keep a separate religion of their own. They received baptism, took Orthodox patron saints, sang the Pascha. The old practices did not vanish in the first generation, or the second. Less and less with every century β but you can still see, in Roma villages today, a people waiting for the light of Christ to finish its work.