Raja is sanskrit for Royal. Raja Yoga is considered The Royal Path.
The name is interchangeable with Ashtangha which means 8 rungs (Note: Not to be confused with a certain style of Hatha Yoga introduced by Sri Patabi Jois who named it Ashtangha Yoga as well).
Raja Yoga has 8 rungs or aspects to it.
- Yama
- Niyama
- Asana
- Pranayama
- Pratyahara