Haggith (חַגִּית) means "festive" in Hebrew — from hag (festival). In 2 Samuel 3:4, Haggith was the fifth wife of King David and mother of Adonijah, the prince who attempted to claim the throne over Solomon.
Rare but iconic in biblical scholarship.
Haggith 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 Haggith reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.