VANETTE is a mixture of VAN and ETTE. ETTE is a suffix, also means "Small, cute".
LARGO is derived from the Italian word "largo", which means like "wide and loose". Largo is also a musical symbol, means a very slow tempo.
COACH is derived from the name "Kocs", a four-wheeled carriage with suspension manufactured around the 15th century. This four-wheeled carriage was manufactured in the Hungarian city of Kocs. It's quality was so high that it became famous in various European countries. As a result, the Hungarian city name has come to be synonymous with four-wheeled carriages.