Hadiza is the Hausa (West African) form of Khadija — the name of the Prophet Muhammad's first wife.
Hadiza Bala Usman (born 1976), the Nigerian activist and former managing director of the Nigerian Ports Authority, is a contemporary bearer.
Hadiza 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 Hadiza reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.