Omega
- Omega 1909 (Wolverhampton)
- Omega 1914-1927 (W. J. Green, Coventry)
- Omega 1899 (FR)
- Omega c1910 (FR)
- Austro-Omega (Austria)
- Omega-ILO (Belgium)
- Omega cyclecars, Berlin 1921-1922
- Omega-Six autos, France 1922-1930
The Omega marque was also employed on machines made in Japan and, in 2008, China (aka Lifan).