What does Mía mean?
Primarily a short, affectionate form of María (ultimately from the Hebrew Miriam, meaning uncertain). Its popularity in the Hispanic world is reinforced by coincidence with the Spanish possessive mía 'mine' (also the Italian word 'mine'), though that resemblance is not the name's actual origin.
What does Valentina mean?
The feminine form of Valentinus (Valentine), from the Latin valens 'strong, vigorous, healthy', from the verb valere 'to be strong'. Carried by several early saints named Valentine.