There are 2 artists with this name:
The first is Czech jazz rock / progressive rock band from 70' The second is this rapper:
In his early teens, Ra (short for Raja) arrived with his family in America, settling in San Francisco’s Mission District. Within their first month on the block, Ra witnessed a young man get murdered over five dollars. The killer was the man’s brother in law. This would be Ra’s first lesson on trusting others in the streets of Pardes (the foreign land).