Rumbidzai is from the Shona rumbidzai — give praise, be glorified, be exalted (imperative form). Rumbidzai is one of the Shona feminine names — central to traditional Zimbabwean Christian + Indigenous Bantu heritage. The Shona rumbidzai is central to Zimbabwean church hymnody + Shona-language Christian liturgy Mwari (Supreme God in Shona traditional religion) worship heritage.
Rumbidzai 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 Rumbidzai reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.