Liliane is the French form of Lillian — from the Latin lilium (lily). Liliane Tiger — modern French figure. Liliane Atlan (1932-2011) — French playwright. Liliane Maury Pasquier — Swiss politician.
Liliane 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 Liliane reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.