reds

The story

1. Medieval Greek · borrowed fromῬούσιοι“Reds”
2. Latin · borrowed fromrussātī“Reddish-Brown-Clads”
3. English todayReds

In reference to the ancient Roman and medieval Byzantine racing faction, a calque of Latin russātī (“Reddish-Brown-Clads”) or factio russata (“the reddish-brown-clad faction”) and Medieval Greek Ῥούσιοι (Rhoúsioi, “Reds”).