Polycaste (Πολυκάστη) combines the Greek poly (many) and kastos (skilled, learned). The youngest daughter of King Nestor of Pylos — in Homer's Odyssey Book 3, she anointed and bathed Telemachus when he visited Pylos seeking news of his father Odysseus.
Featured in Homer's Odyssey.
Polycaste 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 Polycaste reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.