Sulabha (सुलभा) means "easy to obtain" — but also "accomplished." The female Sanskrit philosopher of the Mahabharata (Shanti Parva, Chapter 320) — a wandering renunciate who entered King Janaka's mind through yogic powers to test his claim of enlightenment.
Featured in the Mahabharata, Shanti Parva 320.
Sulabha 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 Sulabha reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.