Viviana is from the Italian / Spanish Viviana — from Latin Viviāna (feminine of Vivianus — full of life, lively) — from Latin vivus (living). Viviana is one of the Italian + Spanish + Latin American feminine names — central to traditional Roman Catholic heritage. Italian feminine name reflecting Roman Catholic heritage.
Viviana 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 Viviana reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.