Galene (Γαλήνη) is the Greek word for "calm sea" — also the name of the Nereid goddess of calm seas, daughter of Nereus and Doris.
Galene is rare but distinctive.
Galene 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 Galene reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.