Rina is a feminine given name with multiple origins. It is also a feminine name in the Sanskrit language meaning "melted" or "dissolved", and is also a Hebrew name meaning "song; joy". The name Rina is also a Russian hypocoristic for "Ekaterina" and is a feminine given name of Japanese origins, where it was proportionately used the most in the twentieth century.

Can we draw the following conclusion?
Rina is the 5th most popular name in Russia.
It's impossible to say