Mia means "mine" in Italian and Spanish — the possessive pronoun used as an endearment. In Scandinavian languages, Mia is a diminutive of Maria.
It entered the U.S. top 10 in 2009 and has remained there since. A short, internationally pronounceable name that means something tender in two language families.
In Pythagorean numerology the letters of Mia reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.