Alena / Alena Steam Products Company
Aldo / Albaugh-Dover Company
Alden Sampson / Alden Sampson Manufacturing Company
Alco (Automarke)
Albany / Albany Automobile Company
Aland / Aland Motor Car Company
Akron Two-Cycle Automobile Company
Ajax / The Ajax Motor Vehicle Company
Ajax / Parker (Ajax Motors Company / Parker Motor Car Company)
Ajax / Ajax Motors Corporation