NO… Lexus and Infiniti are two completley different Luxury vehicle manufacturers. Infiniti is the luxury car division of the Japanese automaker Nissan motors just as Lexus is to Toyota or Audi is to Volkswagen. Infiniti officially started selling vehicles on November 8, 1989 in North America and its global operations have since grown to include the Middle East, South Korea, Taiwan, China the United States and 18 countries across Europe. The Current Infiniti Range includes 7 cars like the G37 coupe, G37 sedan, G37 Convertible, M37 M56 sedan, EX35 crossover, FX35 FX50 crossover and the QX56 SUV.

(Pictures of the Infiniti range)
Infiniti G37 coupe
http://cache.jalopnik.com/assets/resources/2008/06/Infiniti-G37-Coupe.jpg
Infiniti G37 convertible
http://www.drivearabia.com/news/wp-content/uploads/2010/03/2010-Infiniti-G37-Convertible-15-450×332.jpg
Infiniti G37 sedan
http://www.egmcartech.com/wp-content/uploads/2009/12/2010_infiniti_g37_sedan_images_010.jpg
Infiniti M37/56
http://image.motortrend.com/f/31507296+w750/2011-infiniti-m56-front-three-quarter-motion.jpg
Infiniti EX35
http://www.jdpower.com/images/vehicles/jdpa/2008/Infiniti/EX35AWD/480/08-Infiniti-EX35AWD-01F34.jpg
Infiniti FX35/50
http://www.cargurus.com/blog/wp-content/uploads/2009/06/2009-infiniti-fx50.jpg
Infiniti QX56
http://www.drivearabia.com/news/wp-content/uploads/2010/04/2011-Infiniti-QX56-5-450×339.jpg