What does Renata mean?
The feminine of the Late Latin Renatus, 'reborn, born again' (re- 'again' + natus 'born'), a name adopted by early Christians to signify spiritual rebirth through baptism.
What does Reina mean?
The Spanish word 'reina' means 'queen', descending from Latin 'regina'. Also spelled Reyna. (A separate Hebrew/Yiddish name Reina meaning 'pure' exists; the Spanish 'queen' sense is the relevant one here.)