In Canadian criminal cases, why is the case called R v. Someone? What does the R stand for?

Regina/Rex - the Crown. It basically means the country against the defendant.





It's the same in the UK, Australia and probably other Commonwealth countries.In Canadian criminal cases, why is the case called R v. Someone? What does the R stand for?
Ridiculous and raw while running around with rampant runny snot nosed Rimdaukle Rarumpensnozzleruckle...