What does Julieta mean?
Julieta is the Spanish form of Juliet, from the Roman Julius, “youthful.”
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.)