Viveca is the Swedish form of Vivian — from the Latin vivus (alive, lively). Viveca Sten (born 1959) — Swedish crime novelist; Sandhamn Mysteries series (since 2008) sold 5+ million copies worldwide; the books were adapted into the Swedish TV series Sandhamn Murders (since 2010) — one of Sweden's most-popular crime dramas. Princess Viveca of Sweden — Swedish royal heritage.
Viveca 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 Viveca reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.