Pythias (Πυθιάς) was the niece (or adopted daughter) of the philosopher Hermias of Atarneus — the beloved wife of Aristotle and mother of his daughter (also named Pythias).
Featured in Diogenes Laërtius's Lives of Eminent Philosophers.
Pythias 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 Pythias reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.