Philomela (Φιλομήλα) combines the Greek philos (loving) and melos (song) — "lover of song." In Greek myth, Philomela was the Athenian princess transformed into a nightingale after her terrible suffering — she became the symbol of poetic voice through grief.
Eliot's The Waste Land.
Philomela 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 Philomela reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.