Nyambura is one of the nine Kikuyu clan names — meaning "of the rains" or "born in the rainy season." Used widely in Kenya.
Nyambura is widely used in Kenya.
Nyambura 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.
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In Pythagorean numerology the letters of Nyambura reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.