Jacinda is a variant of Hyacintha — from the Greek flower name. Jacinda Ardern (born 1980) served as the 40th Prime Minister of New Zealand (2017-2023) — the world's youngest female head of government at the time of taking office. The second elected world leader to give birth in office (after Benazir Bhutto). Her response to the 2019 Christchurch mosque shootings — banning military-style semi-automatic weapons within weeks — became a global model of decisive crisis leadership.
Subject of multiple biographies including Jacinda Ardern: The Story Behind an Extraordinary Leader (2019).
Jacinda 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 Jacinda reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.