Pia is from the Latin pia (feminine of pius) — "pious, devout, dutiful." Pia Wurtzbach (born 1989) — Filipino-German beauty queen; Miss Universe 2015 — her crowning is among the most-watched moments in pageant history because host Steve Harvey initially announced Miss Colombia (Ariadna Gutierrez) as winner, then corrected himself moments later, making Wurtzbach the actual Miss Universe. Third Filipina to win Miss Universe.
Pia does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Pia reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.