Ayanda is from the South African Zulu / Xhosa ayanda — they are growing, they are increasing. Ayanda is one of the South African unisex names — central to traditional Zulu + Xhosa cultural heritage. The Nguni linguistic prefix a-ya- (they are) is central to South African + Zimbabwean + Mozambican naming heritage.
Ayanda 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 Ayanda reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.