Division sharer with ATL and PHI (3)
I believe the answer is:
nym
(Other definitions for nym that I've seen before include "Pistol's companion (Henry V, MWOW)" , "Falstaff crony (Hen.V)" , "Criminal crony of Falstaff" , "One of Falstaff's followers (TMWOW)" , "Corporal in Henry V" .)