Lilianna is the modern American double-N spelling of Liliana — from the Latin lilium (the lily flower) — symbol of purity in Christian tradition. A top-500 US baby name since 2008. The base name Liliana ranks higher (top-200); Lilianna is the elaborated double-N spelling reflecting the broader 2010s American taste for -anna / -onna endings. Liliana Cavani (born 1933) — Italian filmmaker; The Night Porter (1974) is one of the most-controversial European art films of the 1970s. Liliana Komorowska — Polish-Canadian actress. Liliana Calderón — Mexican telenovela actress. The Lily flower itself has been a symbol of feminine purity in Western iconography since classical antiquity; the Easter lily is a defining symbol of the Christian Easter celebration; the Madonna lily features in Renaissance Annunciation paintings.
Lilianna 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 Lilianna reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.