Gioconda is the Italian word for "joyful" or "cheerful" — the same root as the Latin iucundus. La Gioconda is the Italian name for Leonardo da Vinci's Mona Lisa (1503-1506) — properly known as Ritratto di Monna Lisa del Giocondo after the sitter's married name.
Gioconda is rare but iconic.
Gioconda 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 Gioconda reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.